From: Philipp Hagemeister <phihag@phihag.de>
Date: Sat, 29 Dec 2012 15:56:52 +0000 (+0100)
Subject: Revert "Removed a spurious increment_downloads"
X-Git-Url: https://git.cielonegro.org/gitweb.cgi?a=commitdiff_plain;h=0deac3a2d8aeca756ae9f0620af9185449c6feb2;p=youtube-dl.git

Revert "Removed a spurious increment_downloads"

This reverts commit 92e3e18a1d1fb35b6d73b609725c250123835969.
---

diff --git a/youtube_dl/InfoExtractors.py b/youtube_dl/InfoExtractors.py
index 3715bef50..e3cf7e115 100755
--- a/youtube_dl/InfoExtractors.py
+++ b/youtube_dl/InfoExtractors.py
@@ -1073,2610 +1073,6 @@ class VimeoIE(InfoExtractor):
         }]
 
 
-class ArteTvIE(InfoExtractor):
-    """arte.tv information extractor."""
-
-    _VALID_URL = r'(?:http://)?videos\.arte\.tv/(?:fr|de)/videos/.*'
-    _LIVE_URL = r'index-[0-9]+\.html$'
-
-    IE_NAME = u'arte.tv'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[arte.tv] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[arte.tv] %s: Extracting information' % video_id)
-
-    def fetch_webpage(self, url):
-        request = compat_urllib_request.Request(url)
-        try:
-            self.report_download_webpage(url)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-        except ValueError as err:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-        return webpage
-
-    def grep_webpage(self, url, regex, regexFlags, matchTuples):
-        page = self.fetch_webpage(url)
-        mobj = re.search(regex, page, regexFlags)
-        info = {}
-
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        for (i, key, err) in matchTuples:
-            if mobj.group(i) is None:
-                self._downloader.trouble(err)
-                return
-            else:
-                info[key] = mobj.group(i)
-
-        return info
-
-    def extractLiveStream(self, url):
-        video_lang = url.split('/')[-4]
-        info = self.grep_webpage(
-            url,
-            r'src="(.*?/videothek_js.*?\.js)',
-            0,
-            [
-                (1, 'url', u'ERROR: Invalid URL: %s' % url)
-            ]
-        )
-        http_host = url.split('/')[2]
-        next_url = 'http://%s%s' % (http_host, compat_urllib_parse.unquote(info.get('url')))
-        info = self.grep_webpage(
-            next_url,
-            r'(s_artestras_scst_geoFRDE_' + video_lang + '.*?)\'.*?' +
-                '(http://.*?\.swf).*?' +
-                '(rtmp://.*?)\'',
-            re.DOTALL,
-            [
-                (1, 'path',   u'ERROR: could not extract video path: %s' % url),
-                (2, 'player', u'ERROR: could not extract video player: %s' % url),
-                (3, 'url',    u'ERROR: could not extract video url: %s' % url)
-            ]
-        )
-        video_url = u'%s/%s' % (info.get('url'), info.get('path'))
-
-    def extractPlus7Stream(self, url):
-        video_lang = url.split('/')[-3]
-        info = self.grep_webpage(
-            url,
-            r'param name="movie".*?videorefFileUrl=(http[^\'"&]*)',
-            0,
-            [
-                (1, 'url', u'ERROR: Invalid URL: %s' % url)
-            ]
-        )
-        next_url = compat_urllib_parse.unquote(info.get('url'))
-        info = self.grep_webpage(
-            next_url,
-            r'<video lang="%s" ref="(http[^\'"&]*)' % video_lang,
-            0,
-            [
-                (1, 'url', u'ERROR: Could not find <video> tag: %s' % url)
-            ]
-        )
-        next_url = compat_urllib_parse.unquote(info.get('url'))
-
-        info = self.grep_webpage(
-            next_url,
-            r'<video id="(.*?)".*?>.*?' +
-                '<name>(.*?)</name>.*?' +
-                '<dateVideo>(.*?)</dateVideo>.*?' +
-                '<url quality="hd">(.*?)</url>',
-            re.DOTALL,
-            [
-                (1, 'id',    u'ERROR: could not extract video id: %s' % url),
-                (2, 'title', u'ERROR: could not extract video title: %s' % url),
-                (3, 'date',  u'ERROR: could not extract video date: %s' % url),
-                (4, 'url',   u'ERROR: could not extract video url: %s' % url)
-            ]
-        )
-
-        return {
-            'id':           info.get('id'),
-            'url':          compat_urllib_parse.unquote(info.get('url')),
-            'uploader':     u'arte.tv',
-            'upload_date':  info.get('date'),
-            'title':        info.get('title').decode('utf-8'),
-            'ext':          u'mp4',
-            'format':       u'NA',
-            'player_url':   None,
-        }
-
-    def _real_extract(self, url):
-        video_id = url.split('/')[-1]
-        self.report_extraction(video_id)
-
-        if re.search(self._LIVE_URL, video_id) is not None:
-            self.extractLiveStream(url)
-            return
-        else:
-            info = self.extractPlus7Stream(url)
-
-        return [info]
-
-
-class GenericIE(InfoExtractor):
-    """Generic last-resort information extractor."""
-
-    _VALID_URL = r'.*'
-    IE_NAME = u'generic'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'WARNING: Falling back on generic information extractor.')
-        self._downloader.to_screen(u'[generic] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[generic] %s: Extracting information' % video_id)
-
-    def report_following_redirect(self, new_url):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[redirect] Following redirect to %s' % new_url)
-
-    def _test_redirect(self, url):
-        """Check if it is a redirect, like url shorteners, in case restart chain."""
-        class HeadRequest(compat_urllib_request.Request):
-            def get_method(self):
-                return "HEAD"
-
-        class HEADRedirectHandler(compat_urllib_request.HTTPRedirectHandler):
-            """
-            Subclass the HTTPRedirectHandler to make it use our
-            HeadRequest also on the redirected URL
-            """
-            def redirect_request(self, req, fp, code, msg, headers, newurl):
-                if code in (301, 302, 303, 307):
-                    newurl = newurl.replace(' ', '%20')
-                    newheaders = dict((k,v) for k,v in req.headers.items()
-                                      if k.lower() not in ("content-length", "content-type"))
-                    return HeadRequest(newurl,
-                                       headers=newheaders,
-                                       origin_req_host=req.get_origin_req_host(),
-                                       unverifiable=True)
-                else:
-                    raise compat_urllib_error.HTTPError(req.get_full_url(), code, msg, headers, fp)
-
-        class HTTPMethodFallback(compat_urllib_request.BaseHandler):
-            """
-            Fallback to GET if HEAD is not allowed (405 HTTP error)
-            """
-            def http_error_405(self, req, fp, code, msg, headers):
-                fp.read()
-                fp.close()
-
-                newheaders = dict((k,v) for k,v in req.headers.items()
-                                  if k.lower() not in ("content-length", "content-type"))
-                return self.parent.open(compat_urllib_request.Request(req.get_full_url(),
-                                                 headers=newheaders,
-                                                 origin_req_host=req.get_origin_req_host(),
-                                                 unverifiable=True))
-
-        # Build our opener
-        opener = compat_urllib_request.OpenerDirector()
-        for handler in [compat_urllib_request.HTTPHandler, compat_urllib_request.HTTPDefaultErrorHandler,
-                        HTTPMethodFallback, HEADRedirectHandler,
-                        compat_urllib_error.HTTPErrorProcessor, compat_urllib_request.HTTPSHandler]:
-            opener.add_handler(handler())
-
-        response = opener.open(HeadRequest(url))
-        new_url = response.geturl()
-
-        if url == new_url:
-            return False
-
-        self.report_following_redirect(new_url)
-        self._downloader.download([new_url])
-        return True
-
-    def _real_extract(self, url):
-        if self._test_redirect(url): return
-
-        video_id = url.split('/')[-1]
-        request = compat_urllib_request.Request(url)
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-        except ValueError as err:
-            # since this is the last-resort InfoExtractor, if
-            # this error is thrown, it'll be thrown here
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        self.report_extraction(video_id)
-        # Start with something easy: JW Player in SWFObject
-        mobj = re.search(r'flashvars: [\'"](?:.*&)?file=(http[^\'"&]*)', webpage)
-        if mobj is None:
-            # Broaden the search a little bit
-            mobj = re.search(r'[^A-Za-z0-9]?(?:file|source)=(http[^\'"&]*)', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        # It's possible that one of the regexes
-        # matched, but returned an empty group:
-        if mobj.group(1) is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        video_url = compat_urllib_parse.unquote(mobj.group(1))
-        video_id = os.path.basename(video_url)
-
-        # here's a fun little line of code for you:
-        video_extension = os.path.splitext(video_id)[1][1:]
-        video_id = os.path.splitext(video_id)[0]
-
-        # it's tempting to parse this further, but you would
-        # have to take into account all the variations like
-        #   Video Title - Site Name
-        #   Site Name | Video Title
-        #   Video Title - Tagline | Site Name
-        # and so on and so forth; it's just not practical
-        mobj = re.search(r'<title>(.*)</title>', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract title')
-            return
-        video_title = mobj.group(1)
-
-        # video uploader is domain name
-        mobj = re.match(r'(?:https?://)?([^/]*)/.*', url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract title')
-            return
-        video_uploader = mobj.group(1)
-
-        return [{
-            'id':       video_id,
-            'url':      video_url,
-            'uploader': video_uploader,
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension,
-        }]
-
-
-class YoutubeSearchIE(InfoExtractor):
-    """Information Extractor for YouTube search queries."""
-    _VALID_URL = r'ytsearch(\d+|all)?:[\s\S]+'
-    _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
-    _max_youtube_results = 1000
-    IE_NAME = u'youtube:search'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_page(self, query, pagenum):
-        """Report attempt to download search page with given number."""
-        query = query.decode(preferredencoding())
-        self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
-
-    def _real_extract(self, query):
-        mobj = re.match(self._VALID_URL, query)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
-            return
-
-        prefix, query = query.split(':')
-        prefix = prefix[8:]
-        query = query.encode('utf-8')
-        if prefix == '':
-            self._download_n_results(query, 1)
-            return
-        elif prefix == 'all':
-            self._download_n_results(query, self._max_youtube_results)
-            return
-        else:
-            try:
-                n = int(prefix)
-                if n <= 0:
-                    self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
-                    return
-                elif n > self._max_youtube_results:
-                    self._downloader.to_stderr(u'WARNING: ytsearch returns max %i results (you requested %i)' % (self._max_youtube_results, n))
-                    n = self._max_youtube_results
-                self._download_n_results(query, n)
-                return
-            except ValueError: # parsing prefix as integer fails
-                self._download_n_results(query, 1)
-                return
-
-    def _download_n_results(self, query, n):
-        """Downloads a specified number of results for a query"""
-
-        video_ids = []
-        pagenum = 0
-        limit = n
-
-        while (50 * pagenum) < limit:
-            self.report_download_page(query, pagenum+1)
-            result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
-            request = compat_urllib_request.Request(result_url)
-            try:
-                data = compat_urllib_request.urlopen(request).read()
-            except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-                self._downloader.trouble(u'ERROR: unable to download API page: %s' % compat_str(err))
-                return
-            api_response = json.loads(data)['data']
-
-            new_ids = list(video['id'] for video in api_response['items'])
-            video_ids += new_ids
-
-            limit = min(n, api_response['totalItems'])
-            pagenum += 1
-
-        if len(video_ids) > n:
-            video_ids = video_ids[:n]
-        for id in video_ids:
-            self._downloader.download(['http://www.youtube.com/watch?v=%s' % id])
-        return
-
-
-class GoogleSearchIE(InfoExtractor):
-    """Information Extractor for Google Video search queries."""
-    _VALID_URL = r'gvsearch(\d+|all)?:[\s\S]+'
-    _TEMPLATE_URL = 'http://video.google.com/videosearch?q=%s+site:video.google.com&start=%s&hl=en'
-    _VIDEO_INDICATOR = r'<a href="http://video\.google\.com/videoplay\?docid=([^"\&]+)'
-    _MORE_PAGES_INDICATOR = r'class="pn" id="pnnext"'
-    _max_google_results = 1000
-    IE_NAME = u'video.google:search'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_page(self, query, pagenum):
-        """Report attempt to download playlist page with given number."""
-        query = query.decode(preferredencoding())
-        self._downloader.to_screen(u'[video.google] query "%s": Downloading page %s' % (query, pagenum))
-
-    def _real_extract(self, query):
-        mobj = re.match(self._VALID_URL, query)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
-            return
-
-        prefix, query = query.split(':')
-        prefix = prefix[8:]
-        query = query.encode('utf-8')
-        if prefix == '':
-            self._download_n_results(query, 1)
-            return
-        elif prefix == 'all':
-            self._download_n_results(query, self._max_google_results)
-            return
-        else:
-            try:
-                n = int(prefix)
-                if n <= 0:
-                    self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
-                    return
-                elif n > self._max_google_results:
-                    self._downloader.to_stderr(u'WARNING: gvsearch returns max %i results (you requested %i)' % (self._max_google_results, n))
-                    n = self._max_google_results
-                self._download_n_results(query, n)
-                return
-            except ValueError: # parsing prefix as integer fails
-                self._download_n_results(query, 1)
-                return
-
-    def _download_n_results(self, query, n):
-        """Downloads a specified number of results for a query"""
-
-        video_ids = []
-        pagenum = 0
-
-        while True:
-            self.report_download_page(query, pagenum)
-            result_url = self._TEMPLATE_URL % (compat_urllib_parse.quote_plus(query), pagenum*10)
-            request = compat_urllib_request.Request(result_url)
-            try:
-                page = compat_urllib_request.urlopen(request).read()
-            except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-                self._downloader.trouble(u'ERROR: unable to download webpage: %s' % compat_str(err))
-                return
-
-            # Extract video identifiers
-            for mobj in re.finditer(self._VIDEO_INDICATOR, page):
-                video_id = mobj.group(1)
-                if video_id not in video_ids:
-                    video_ids.append(video_id)
-                    if len(video_ids) == n:
-                        # Specified n videos reached
-                        for id in video_ids:
-                            self._downloader.download(['http://video.google.com/videoplay?docid=%s' % id])
-                        return
-
-            if re.search(self._MORE_PAGES_INDICATOR, page) is None:
-                for id in video_ids:
-                    self._downloader#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-from __future__ import absolute_import
-
-import datetime
-import netrc
-import os
-import re
-import socket
-import time
-import email.utils
-import xml.etree.ElementTree
-import random
-import math
-
-from .utils import *
-
-
-class InfoExtractor(object):
-    """Information Extractor class.
-
-    Information extractors are the classes that, given a URL, extract
-    information about the video (or videos) the URL refers to. This
-    information includes the real video URL, the video title, author and
-    others. The information is stored in a dictionary which is then
-    passed to the FileDownloader. The FileDownloader processes this
-    information possibly downloading the video to the file system, among
-    other possible outcomes.
-
-    The dictionaries must include the following fields:
-
-    id:             Video identifier.
-    url:            Final video URL.
-    title:          Video title, unescaped.
-    ext:            Video filename extension.
-    uploader:       Full name of the video uploader.
-    upload_date:    Video upload date (YYYYMMDD).
-
-    The following fields are optional:
-
-    format:         The video format, defaults to ext (used for --get-format)
-    thumbnail:      Full URL to a video thumbnail image.
-    description:    One-line video description.
-    uploader_id:    Nickname or id of the video uploader.
-    player_url:     SWF Player URL (used for rtmpdump).
-    subtitles:      The .srt file contents.
-    urlhandle:      [internal] The urlHandle to be used to download the file,
-                    like returned by urllib.request.urlopen
-
-    The fields should all be Unicode strings.
-
-    Subclasses of this one should re-define the _real_initialize() and
-    _real_extract() methods and define a _VALID_URL regexp.
-    Probably, they should also be added to the list of extractors.
-
-    _real_extract() must return a *list* of information dictionaries as
-    described above.
-
-    Finally, the _WORKING attribute should be set to False for broken IEs
-    in order to warn the users and skip the tests.
-    """
-
-    _ready = False
-    _downloader = None
-    _WORKING = True
-
-    def __init__(self, downloader=None):
-        """Constructor. Receives an optional downloader."""
-        self._ready = False
-        self.set_downloader(downloader)
-
-    def suitable(self, url):
-        """Receives a URL and returns True if suitable for this IE."""
-        return re.match(self._VALID_URL, url) is not None
-
-    def working(self):
-        """Getter method for _WORKING."""
-        return self._WORKING
-
-    def initialize(self):
-        """Initializes an instance (authentication, etc)."""
-        if not self._ready:
-            self._real_initialize()
-            self._ready = True
-
-    def extract(self, url):
-        """Extracts URL information and returns it in list of dicts."""
-        self.initialize()
-        return self._real_extract(url)
-
-    def set_downloader(self, downloader):
-        """Sets the downloader for this IE."""
-        self._downloader = downloader
-
-    def _real_initialize(self):
-        """Real initialization process. Redefine in subclasses."""
-        pass
-
-    def _real_extract(self, url):
-        """Real extraction process. Redefine in subclasses."""
-        pass
-
-    @property
-    def IE_NAME(self):
-        return type(self).__name__[:-2]
-
-class YoutubeIE(InfoExtractor):
-    """Information extractor for youtube.com."""
-
-    _VALID_URL = r"""^
-                     (
-                         (?:https?://)?                                       # http(s):// (optional)
-                         (?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/|
-                            tube\.majestyc\.net/)                             # the various hostnames, with wildcard subdomains
-                         (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
-                         (?!view_play_list|my_playlists|artist|playlist)      # ignore playlist URLs
-                         (?:                                                  # the various things that can precede the ID:
-                             (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
-                             |(?:                                             # or the v= param in all its forms
-                                 (?:watch(?:_popup)?(?:\.php)?)?              # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
-                                 (?:\?|\#!?)                                  # the params delimiter ? or # or #!
-                                 (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
-                                 v=
-                             )
-                         )?                                                   # optional -> youtube.com/xxxx is OK
-                     )?                                                       # all until now is optional -> you can pass the naked ID
-                     ([0-9A-Za-z_-]+)                                         # here is it! the YouTube video ID
-                     (?(1).+)?                                                # if we found the ID, everything can follow
-                     $"""
-    _LANG_URL = r'http://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
-    _LOGIN_URL = 'https://www.youtube.com/signup?next=/&gl=US&hl=en'
-    _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
-    _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
-    _NETRC_MACHINE = 'youtube'
-    # Listed in order of quality
-    _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
-    _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
-    _video_extensions = {
-        '13': '3gp',
-        '17': 'mp4',
-        '18': 'mp4',
-        '22': 'mp4',
-        '37': 'mp4',
-        '38': 'video', # You actually don't know if this will be MOV, AVI or whatever
-        '43': 'webm',
-        '44': 'webm',
-        '45': 'webm',
-        '46': 'webm',
-    }
-    _video_dimensions = {
-        '5': '240x400',
-        '6': '???',
-        '13': '???',
-        '17': '144x176',
-        '18': '360x640',
-        '22': '720x1280',
-        '34': '360x640',
-        '35': '480x854',
-        '37': '1080x1920',
-        '38': '3072x4096',
-        '43': '360x640',
-        '44': '480x854',
-        '45': '720x1280',
-        '46': '1080x1920',
-    }
-    IE_NAME = u'youtube'
-
-    def suitable(self, url):
-        """Receives a URL and returns True if suitable for this IE."""
-        return re.match(self._VALID_URL, url, re.VERBOSE) is not None
-
-    def report_lang(self):
-        """Report attempt to set language."""
-        self._downloader.to_screen(u'[youtube] Setting language')
-
-    def report_login(self):
-        """Report attempt to log in."""
-        self._downloader.to_screen(u'[youtube] Logging in')
-
-    def report_age_confirmation(self):
-        """Report attempt to confirm age."""
-        self._downloader.to_screen(u'[youtube] Confirming age')
-
-    def report_video_webpage_download(self, video_id):
-        """Report attempt to download video webpage."""
-        self._downloader.to_screen(u'[youtube] %s: Downloading video webpage' % video_id)
-
-    def report_video_info_webpage_download(self, video_id):
-        """Report attempt to download video info webpage."""
-        self._downloader.to_screen(u'[youtube] %s: Downloading video info webpage' % video_id)
-
-    def report_video_subtitles_download(self, video_id):
-        """Report attempt to download video info webpage."""
-        self._downloader.to_screen(u'[youtube] %s: Downloading video subtitles' % video_id)
-
-    def report_information_extraction(self, video_id):
-        """Report attempt to extract video information."""
-        self._downloader.to_screen(u'[youtube] %s: Extracting video information' % video_id)
-
-    def report_unavailable_format(self, video_id, format):
-        """Report extracted video URL."""
-        self._downloader.to_screen(u'[youtube] %s: Format %s not available' % (video_id, format))
-
-    def report_rtmp_download(self):
-        """Indicate the download will use the RTMP protocol."""
-        self._downloader.to_screen(u'[youtube] RTMP download detected')
-
-    def _closed_captions_xml_to_srt(self, xml_string):
-        srt = ''
-        texts = re.findall(r'<text start="([\d\.]+)"( dur="([\d\.]+)")?>([^<]+)</text>', xml_string, re.MULTILINE)
-        # TODO parse xml instead of regex
-        for n, (start, dur_tag, dur, caption) in enumerate(texts):
-            if not dur: dur = '4'
-            start = float(start)
-            end = start + float(dur)
-            start = "%02i:%02i:%02i,%03i" %(start/(60*60), start/60%60, start%60, start%1*1000)
-            end = "%02i:%02i:%02i,%03i" %(end/(60*60), end/60%60, end%60, end%1*1000)
-            caption = unescapeHTML(caption)
-            caption = unescapeHTML(caption) # double cycle, intentional
-            srt += str(n+1) + '\n'
-            srt += start + ' --> ' + end + '\n'
-            srt += caption + '\n\n'
-        return srt
-
-    def _extract_subtitles(self, video_id):
-        self.report_video_subtitles_download(video_id)
-        request = compat_urllib_request.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
-        try:
-            srt_list = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            return (u'WARNING: unable to download video subtitles: %s' % compat_str(err), None)
-        srt_lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', srt_list)
-        srt_lang_list = dict((l[1], l[0]) for l in srt_lang_list)
-        if not srt_lang_list:
-            return (u'WARNING: video has no closed captions', None)
-        if self._downloader.params.get('subtitleslang', False):
-            srt_lang = self._downloader.params.get('subtitleslang')
-        elif 'en' in srt_lang_list:
-            srt_lang = 'en'
-        else:
-            srt_lang = list(srt_lang_list.keys())[0]
-        if not srt_lang in srt_lang_list:
-            return (u'WARNING: no closed captions found in the specified language', None)
-        request = compat_urllib_request.Request('http://www.youtube.com/api/timedtext?lang=%s&name=%s&v=%s' % (srt_lang, srt_lang_list[srt_lang], video_id))
-        try:
-            srt_xml = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            return (u'WARNING: unable to download video subtitles: %s' % compat_str(err), None)
-        if not srt_xml:
-            return (u'WARNING: unable to download video subtitles', None)
-        return (None, self._closed_captions_xml_to_srt(srt_xml))
-
-    def _print_formats(self, formats):
-        print('Available formats:')
-        for x in formats:
-            print('%s\t:\t%s\t[%s]' %(x, self._video_extensions.get(x, 'flv'), self._video_dimensions.get(x, '???')))
-
-    def _real_initialize(self):
-        if self._downloader is None:
-            return
-
-        username = None
-        password = None
-        downloader_params = self._downloader.params
-
-        # Attempt to use provided username and password or .netrc data
-        if downloader_params.get('username', None) is not None:
-            username = downloader_params['username']
-            password = downloader_params['password']
-        elif downloader_params.get('usenetrc', False):
-            try:
-                info = netrc.netrc().authenticators(self._NETRC_MACHINE)
-                if info is not None:
-                    username = info[0]
-                    password = info[2]
-                else:
-                    raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
-            except (IOError, netrc.NetrcParseError) as err:
-                self._downloader.to_stderr(u'WARNING: parsing .netrc: %s' % compat_str(err))
-                return
-
-        # Set language
-        request = compat_urllib_request.Request(self._LANG_URL)
-        try:
-            self.report_lang()
-            compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.to_stderr(u'WARNING: unable to set language: %s' % compat_str(err))
-            return
-
-        # No authentication to be performed
-        if username is None:
-            return
-
-        # Log in
-        login_form = {
-                'current_form': 'loginForm',
-                'next':     '/',
-                'action_login': 'Log In',
-                'username': username,
-                'password': password,
-                }
-        request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(login_form))
-        try:
-            self.report_login()
-            login_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
-            if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
-                self._downloader.to_stderr(u'WARNING: unable to log in: bad username or password')
-                return
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.to_stderr(u'WARNING: unable to log in: %s' % compat_str(err))
-            return
-
-        # Confirm age
-        age_form = {
-                'next_url':     '/',
-                'action_confirm':   'Confirm',
-                }
-        request = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
-        try:
-            self.report_age_confirmation()
-            age_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable to confirm age: %s' % compat_str(err))
-            return
-
-    def _extract_id(self, url):
-        mobj = re.match(self._VALID_URL, url, re.VERBOSE)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-            return
-        video_id = mobj.group(2)
-        return video_id
-
-    def _real_extract(self, url):
-        # Extract original video URL from URL with redirection, like age verification, using next_url parameter
-        mobj = re.search(self._NEXT_URL_RE, url)
-        if mobj:
-            url = 'http://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
-        video_id = self._extract_id(url)
-
-        # Get video webpage
-        self.report_video_webpage_download(video_id)
-        url = 'http://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
-        request = compat_urllib_request.Request(url)
-        try:
-            video_webpage_bytes = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % compat_str(err))
-            return
-
-        video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
-
-        # Attempt to extract SWF player URL
-        mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
-        if mobj is not None:
-            player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
-        else:
-            player_url = None
-
-        # Get video info
-        self.report_video_info_webpage_download(video_id)
-        for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
-            video_info_url = ('http://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
-                    % (video_id, el_type))
-            request = compat_urllib_request.Request(video_info_url)
-            try:
-                video_info_webpage_bytes = compat_urllib_request.urlopen(request).read()
-                video_info_webpage = video_info_webpage_bytes.decode('utf-8', 'ignore')
-                video_info = compat_parse_qs(video_info_webpage)
-                if 'token' in video_info:
-                    break
-            except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-                self._downloader.trouble(u'ERROR: unable to download video info webpage: %s' % compat_str(err))
-                return
-        if 'token' not in video_info:
-            if 'reason' in video_info:
-                self._downloader.trouble(u'ERROR: YouTube said: %s' % video_info['reason'][0])
-            else:
-                self._downloader.trouble(u'ERROR: "token" parameter not in video info for unknown reason')
-            return
-
-        # Check for "rental" videos
-        if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
-            self._downloader.trouble(u'ERROR: "rental" videos not supported')
-            return
-
-        # Start extracting information
-        self.report_information_extraction(video_id)
-
-        # uploader
-        if 'author' not in video_info:
-            self._downloader.trouble(u'ERROR: unable to extract uploader name')
-            return
-        video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
-
-        # uploader_id
-        video_uploader_id = None
-        mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/user/([^"]+)">', video_webpage)
-        if mobj is not None:
-            video_uploader_id = mobj.group(1)
-        else:
-            self._downloader.trouble(u'WARNING: unable to extract uploader nickname')
-
-        # title
-        if 'title' not in video_info:
-            self._downloader.trouble(u'ERROR: unable to extract video title')
-            return
-        video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
-
-        # thumbnail image
-        if 'thumbnail_url' not in video_info:
-            self._downloader.trouble(u'WARNING: unable to extract video thumbnail')
-            video_thumbnail = ''
-        else:   # don't panic if we can't find it
-            video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
-
-        # upload date
-        upload_date = None
-        mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
-        if mobj is not None:
-            upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
-            format_expressions = ['%d %B %Y', '%B %d %Y', '%b %d %Y']
-            for expression in format_expressions:
-                try:
-                    upload_date = datetime.datetime.strptime(upload_date, expression).strftime('%Y%m%d')
-                except:
-                    pass
-
-        # description
-        video_description = get_element_by_id("eow-description", video_webpage)
-        if video_description:
-            video_description = clean_html(video_description)
-        else:
-            video_description = ''
-
-        # closed captions
-        video_subtitles = None
-        if self._downloader.params.get('writesubtitles', False):
-            (srt_error, video_subtitles) = self._extract_subtitles(video_id)
-            if srt_error:
-                self._downloader.trouble(srt_error)
-
-        if 'length_seconds' not in video_info:
-            self._downloader.trouble(u'WARNING: unable to extract video duration')
-            video_duration = ''
-        else:
-            video_duration = compat_urllib_parse.unquote_plus(video_info['length_seconds'][0])
-
-        # token
-        video_token = compat_urllib_parse.unquote_plus(video_info['token'][0])
-
-        # Decide which formats to download
-        req_format = self._downloader.params.get('format', None)
-
-        if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
-            self.report_rtmp_download()
-            video_url_list = [(None, video_info['conn'][0])]
-        elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
-            url_data_strs = video_info['url_encoded_fmt_stream_map'][0].split(',')
-            url_data = [compat_parse_qs(uds) for uds in url_data_strs]
-            url_data = [ud for ud in url_data if 'itag' in ud and 'url' in ud]
-            url_map = dict((ud['itag'][0], ud['url'][0] + '&signature=' + ud['sig'][0]) for ud in url_data)
-
-            format_limit = self._downloader.params.get('format_limit', None)
-            available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
-            if format_limit is not None and format_limit in available_formats:
-                format_list = available_formats[available_formats.index(format_limit):]
-            else:
-                format_list = available_formats
-            existing_formats = [x for x in format_list if x in url_map]
-            if len(existing_formats) == 0:
-                self._downloader.trouble(u'ERROR: no known formats available for video')
-                return
-            if self._downloader.params.get('listformats', None):
-                self._print_formats(existing_formats)
-                return
-            if req_format is None or req_format == 'best':
-                video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
-            elif req_format == 'worst':
-                video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
-            elif req_format in ('-1', 'all'):
-                video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
-            else:
-                # Specific formats. We pick the first in a slash-delimeted sequence.
-                # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
-                req_formats = req_format.split('/')
-                video_url_list = None
-                for rf in req_formats:
-                    if rf in url_map:
-                        video_url_list = [(rf, url_map[rf])]
-                        break
-                if video_url_list is None:
-                    self._downloader.trouble(u'ERROR: requested format not available')
-                    return
-        else:
-            self._downloader.trouble(u'ERROR: no conn or url_encoded_fmt_stream_map information found in video info')
-            return
-
-        results = []
-        for format_param, video_real_url in video_url_list:
-            # Extension
-            video_extension = self._video_extensions.get(format_param, 'flv')
-
-            video_format = '{0} - {1}'.format(format_param if format_param else video_extension,
-                                              self._video_dimensions.get(format_param, '???'))
-
-            results.append({
-                'id':       video_id,
-                'url':      video_real_url,
-                'uploader': video_uploader,
-                'uploader_id': video_uploader_id,
-                'upload_date':  upload_date,
-                'title':    video_title,
-                'ext':      video_extension,
-                'format':   video_format,
-                'thumbnail':    video_thumbnail,
-                'description':  video_description,
-                'player_url':   player_url,
-                'subtitles':    video_subtitles,
-                'duration':     video_duration
-            })
-        return results
-
-
-class MetacafeIE(InfoExtractor):
-    """Information Extractor for metacafe.com."""
-
-    _VALID_URL = r'(?:http://)?(?:www\.)?metacafe\.com/watch/([^/]+)/([^/]+)/.*'
-    _DISCLAIMER = 'http://www.metacafe.com/family_filter/'
-    _FILTER_POST = 'http://www.metacafe.com/f/index.php?inputType=filter&controllerGroup=user'
-    IE_NAME = u'metacafe'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_disclaimer(self):
-        """Report disclaimer retrieval."""
-        self._downloader.to_screen(u'[metacafe] Retrieving disclaimer')
-
-    def report_age_confirmation(self):
-        """Report attempt to confirm age."""
-        self._downloader.to_screen(u'[metacafe] Confirming age')
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[metacafe] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[metacafe] %s: Extracting information' % video_id)
-
-    def _real_initialize(self):
-        # Retrieve disclaimer
-        request = compat_urllib_request.Request(self._DISCLAIMER)
-        try:
-            self.report_disclaimer()
-            disclaimer = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable to retrieve disclaimer: %s' % compat_str(err))
-            return
-
-        # Confirm age
-        disclaimer_form = {
-            'filters': '0',
-            'submit': "Continue - I'm over 18",
-            }
-        request = compat_urllib_request.Request(self._FILTER_POST, compat_urllib_parse.urlencode(disclaimer_form))
-        try:
-            self.report_age_confirmation()
-            disclaimer = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable to confirm age: %s' % compat_str(err))
-            return
-
-    def _real_extract(self, url):
-        # Extract id and simplified title from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(1)
-
-        # Check if video comes from YouTube
-        mobj2 = re.match(r'^yt-(.*)$', video_id)
-        if mobj2 is not None:
-            self._downloader.download(['http://www.youtube.com/watch?v=%s' % mobj2.group(1)])
-            return
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request('http://www.metacafe.com/watch/%s/' % video_id)
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract URL, uploader and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'(?m)&mediaURL=([^&]+)', webpage)
-        if mobj is not None:
-            mediaURL = compat_urllib_parse.unquote(mobj.group(1))
-            video_extension = mediaURL[-3:]
-
-            # Extract gdaKey if available
-            mobj = re.search(r'(?m)&gdaKey=(.*?)&', webpage)
-            if mobj is None:
-                video_url = mediaURL
-            else:
-                gdaKey = mobj.group(1)
-                video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
-        else:
-            mobj = re.search(r' name="flashvars" value="(.*?)"', webpage)
-            if mobj is None:
-                self._downloader.trouble(u'ERROR: unable to extract media URL')
-                return
-            vardict = compat_parse_qs(mobj.group(1))
-            if 'mediaData' not in vardict:
-                self._downloader.trouble(u'ERROR: unable to extract media URL')
-                return
-            mobj = re.search(r'"mediaURL":"(http.*?)","key":"(.*?)"', vardict['mediaData'][0])
-            if mobj is None:
-                self._downloader.trouble(u'ERROR: unable to extract media URL')
-                return
-            mediaURL = mobj.group(1).replace('\\/', '/')
-            video_extension = mediaURL[-3:]
-            video_url = '%s?__gda__=%s' % (mediaURL, mobj.group(2))
-
-        mobj = re.search(r'(?im)<title>(.*) - Video</title>', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract title')
-            return
-        video_title = mobj.group(1).decode('utf-8')
-
-        mobj = re.search(r'submitter=(.*?);', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
-            return
-        video_uploader = mobj.group(1)
-
-        return [{
-            'id':       video_id.decode('utf-8'),
-            'url':      video_url.decode('utf-8'),
-            'uploader': video_uploader.decode('utf-8'),
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension.decode('utf-8'),
-        }]
-
-
-class DailymotionIE(InfoExtractor):
-    """Information Extractor for Dailymotion"""
-
-    _VALID_URL = r'(?i)(?:https?://)?(?:www\.)?dailymotion\.[a-z]{2,3}/video/([^/]+)'
-    IE_NAME = u'dailymotion'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[dailymotion] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[dailymotion] %s: Extracting information' % video_id)
-
-    def _real_extract(self, url):
-        # Extract id and simplified title from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(1).split('_')[0].split('?')[0]
-
-        video_extension = 'mp4'
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url)
-        request.add_header('Cookie', 'family_filter=off')
-        try:
-            self.report_download_webpage(video_id)
-            webpage_bytes = compat_urllib_request.urlopen(request).read()
-            webpage = webpage_bytes.decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract URL, uploader and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'\s*var flashvars = (.*)', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract media URL')
-            return
-        flashvars = compat_urllib_parse.unquote(mobj.group(1))
-
-        for key in ['hd1080URL', 'hd720URL', 'hqURL', 'sdURL', 'ldURL', 'video_url']:
-            if key in flashvars:
-                max_quality = key
-                self._downloader.to_screen(u'[dailymotion] Using %s' % key)
-                break
-        else:
-            self._downloader.trouble(u'ERROR: unable to extract video URL')
-            return
-
-        mobj = re.search(r'"' + max_quality + r'":"(.+?)"', flashvars)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video URL')
-            return
-
-        video_url = compat_urllib_parse.unquote(mobj.group(1)).replace('\\/', '/')
-
-        # TODO: support choosing qualities
-
-        mobj = re.search(r'<meta property="og:title" content="(?P<title>[^"]*)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract title')
-            return
-        video_title = unescapeHTML(mobj.group('title'))
-
-        video_uploader = None
-        mobj = re.search(r'(?im)<span class="owner[^\"]+?">[^<]+?<a [^>]+?>([^<]+?)</a>', webpage)
-        if mobj is None:
-            # lookin for official user
-            mobj_official = re.search(r'<span rel="author"[^>]+?>([^<]+?)</span>', webpage)
-            if mobj_official is None:
-                self._downloader.trouble(u'WARNING: unable to extract uploader nickname')
-            else:
-                video_uploader = mobj_official.group(1)
-        else:
-            video_uploader = mobj.group(1)
-
-        video_upload_date = None
-        mobj = re.search(r'<div class="[^"]*uploaded_cont[^"]*" title="[^"]*">([0-9]{2})-([0-9]{2})-([0-9]{4})</div>', webpage)
-        if mobj is not None:
-            video_upload_date = mobj.group(3) + mobj.group(2) + mobj.group(1)
-
-        return [{
-            'id':       video_id,
-            'url':      video_url,
-            'uploader': video_uploader,
-            'upload_date':  video_upload_date,
-            'title':    video_title,
-            'ext':      video_extension,
-        }]
-
-
-class PhotobucketIE(InfoExtractor):
-    """Information extractor for photobucket.com."""
-
-    _VALID_URL = r'(?:http://)?(?:[a-z0-9]+\.)?photobucket\.com/.*[\?\&]current=(.*\.flv)'
-    IE_NAME = u'photobucket'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[photobucket] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[photobucket] %s: Extracting information' % video_id)
-
-    def _real_extract(self, url):
-        # Extract id from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(1)
-
-        video_extension = 'flv'
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url)
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract URL, uploader, and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'<link rel="video_src" href=".*\?file=([^"]+)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract media URL')
-            return
-        mediaURL = compat_urllib_parse.unquote(mobj.group(1))
-
-        video_url = mediaURL
-
-        mobj = re.search(r'<title>(.*) video by (.*) - Photobucket</title>', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract title')
-            return
-        video_title = mobj.group(1).decode('utf-8')
-
-        video_uploader = mobj.group(2).decode('utf-8')
-
-        return [{
-            'id':       video_id.decode('utf-8'),
-            'url':      video_url.decode('utf-8'),
-            'uploader': video_uploader,
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension.decode('utf-8'),
-        }]
-
-
-class YahooIE(InfoExtractor):
-    """Information extractor for video.yahoo.com."""
-
-    _WORKING = False
-    # _VALID_URL matches all Yahoo! Video URLs
-    # _VPAGE_URL matches only the extractable '/watch/' URLs
-    _VALID_URL = r'(?:http://)?(?:[a-z]+\.)?video\.yahoo\.com/(?:watch|network)/([0-9]+)(?:/|\?v=)([0-9]+)(?:[#\?].*)?'
-    _VPAGE_URL = r'(?:http://)?video\.yahoo\.com/watch/([0-9]+)/([0-9]+)(?:[#\?].*)?'
-    IE_NAME = u'video.yahoo'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[video.yahoo] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[video.yahoo] %s: Extracting information' % video_id)
-
-    def _real_extract(self, url, new_video=True):
-        # Extract ID from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(2)
-        video_extension = 'flv'
-
-        # Rewrite valid but non-extractable URLs as
-        # extractable English language /watch/ URLs
-        if re.match(self._VPAGE_URL, url) is None:
-            request = compat_urllib_request.Request(url)
-            try:
-                webpage = compat_urllib_request.urlopen(request).read()
-            except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-                self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-                return
-
-            mobj = re.search(r'\("id", "([0-9]+)"\);', webpage)
-            if mobj is None:
-                self._downloader.trouble(u'ERROR: Unable to extract id field')
-                return
-            yahoo_id = mobj.group(1)
-
-            mobj = re.search(r'\("vid", "([0-9]+)"\);', webpage)
-            if mobj is None:
-                self._downloader.trouble(u'ERROR: Unable to extract vid field')
-                return
-            yahoo_vid = mobj.group(1)
-
-            url = 'http://video.yahoo.com/watch/%s/%s' % (yahoo_vid, yahoo_id)
-            return self._real_extract(url, new_video=False)
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url)
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract uploader and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'<meta name="title" content="(.*)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video title')
-            return
-        video_title = mobj.group(1).decode('utf-8')
-
-        mobj = re.search(r'<h2 class="ti-5"><a href="http://video\.yahoo\.com/(people|profile)/[0-9]+" beacon=".*">(.*)</a></h2>', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video uploader')
-            return
-        video_uploader = mobj.group(1).decode('utf-8')
-
-        # Extract video thumbnail
-        mobj = re.search(r'<link rel="image_src" href="(.*)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
-            return
-        video_thumbnail = mobj.group(1).decode('utf-8')
-
-        # Extract video description
-        mobj = re.search(r'<meta name="description" content="(.*)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video description')
-            return
-        video_description = mobj.group(1).decode('utf-8')
-        if not video_description:
-            video_description = 'No description available.'
-
-        # Extract video height and width
-        mobj = re.search(r'<meta name="video_height" content="([0-9]+)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video height')
-            return
-        yv_video_height = mobj.group(1)
-
-        mobj = re.search(r'<meta name="video_width" content="([0-9]+)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video width')
-            return
-        yv_video_width = mobj.group(1)
-
-        # Retrieve video playlist to extract media URL
-        # I'm not completely sure what all these options are, but we
-        # seem to need most of them, otherwise the server sends a 401.
-        yv_lg = 'R0xx6idZnW2zlrKP8xxAIR'  # not sure what this represents
-        yv_bitrate = '700'  # according to Wikipedia this is hard-coded
-        request = compat_urllib_request.Request('http://cosmos.bcst.yahoo.com/up/yep/process/getPlaylistFOP.php?node_id=' + video_id +
-                '&tech=flash&mode=playlist&lg=' + yv_lg + '&bitrate=' + yv_bitrate + '&vidH=' + yv_video_height +
-                '&vidW=' + yv_video_width + '&swf=as3&rd=video.yahoo.com&tk=null&adsupported=v1,v2,&eventid=1301797')
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract media URL from playlist XML
-        mobj = re.search(r'<STREAM APP="(http://.*)" FULLPATH="/?(/.*\.flv\?[^"]*)"', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Unable to extract media URL')
-            return
-        video_url = compat_urllib_parse.unquote(mobj.group(1) + mobj.group(2)).decode('utf-8')
-        video_url = unescapeHTML(video_url)
-
-        return [{
-            'id':       video_id.decode('utf-8'),
-            'url':      video_url,
-            'uploader': video_uploader,
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension.decode('utf-8'),
-            'thumbnail':    video_thumbnail.decode('utf-8'),
-            'description':  video_description,
-        }]
-
-
-class VimeoIE(InfoExtractor):
-    """Information extractor for vimeo.com."""
-
-    # _VALID_URL matches Vimeo URLs
-    _VALID_URL = r'(?:https?://)?(?:(?:www|player).)?vimeo\.com/(?:(?:groups|album)/[^/]+/)?(?:videos?/)?([0-9]+)'
-    IE_NAME = u'vimeo'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[vimeo] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[vimeo] %s: Extracting information' % video_id)
-
-    def _real_extract(self, url, new_video=True):
-        # Extract ID from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(1)
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url, None, std_headers)
-        try:
-            self.report_download_webpage(video_id)
-            webpage_bytes = compat_urllib_request.urlopen(request).read()
-            webpage = webpage_bytes.decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Now we begin extracting as much information as we can from what we
-        # retrieved. First we extract the information common to all extractors,
-        # and latter we extract those that are Vimeo specific.
-        self.report_extraction(video_id)
-
-        # Extract the config JSON
-        try:
-            config = webpage.split(' = {config:')[1].split(',assets:')[0]
-            config = json.loads(config)
-        except:
-            self._downloader.trouble(u'ERROR: unable to extract info section')
-            return
-
-        # Extract title
-        video_title = config["video"]["title"]
-
-        # Extract uploader and uploader_id
-        video_uploader = config["video"]["owner"]["name"]
-        video_uploader_id = config["video"]["owner"]["url"].split('/')[-1]
-
-        # Extract video thumbnail
-        video_thumbnail = config["video"]["thumbnail"]
-
-        # Extract video description
-        video_description = get_element_by_attribute("itemprop", "description", webpage)
-        if video_description: video_description = clean_html(video_description)
-        else: video_description = ''
-
-        # Extract upload date
-        video_upload_date = None
-        mobj = re.search(r'<meta itemprop="dateCreated" content="(\d{4})-(\d{2})-(\d{2})T', webpage)
-        if mobj is not None:
-            video_upload_date = mobj.group(1) + mobj.group(2) + mobj.group(3)
-
-        # Vimeo specific: extract request signature and timestamp
-        sig = config['request']['signature']
-        timestamp = config['request']['timestamp']
-
-        # Vimeo specific: extract video codec and quality information
-        # First consider quality, then codecs, then take everything
-        # TODO bind to format param
-        codecs = [('h264', 'mp4'), ('vp8', 'flv'), ('vp6', 'flv')]
-        files = { 'hd': [], 'sd': [], 'other': []}
-        for codec_name, codec_extension in codecs:
-            if codec_name in config["video"]["files"]:
-                if 'hd' in config["video"]["files"][codec_name]:
-                    files['hd'].append((codec_name, codec_extension, 'hd'))
-                elif 'sd' in config["video"]["files"][codec_name]:
-                    files['sd'].append((codec_name, codec_extension, 'sd'))
-                else:
-                    files['other'].append((codec_name, codec_extension, config["video"]["files"][codec_name][0]))
-
-        for quality in ('hd', 'sd', 'other'):
-            if len(files[quality]) > 0:
-                video_quality = files[quality][0][2]
-                video_codec = files[quality][0][0]
-                video_extension = files[quality][0][1]
-                self._downloader.to_screen(u'[vimeo] %s: Downloading %s file at %s quality' % (video_id, video_codec.upper(), video_quality))
-                break
-        else:
-            self._downloader.trouble(u'ERROR: no known codec found')
-            return
-
-        video_url = "http://player.vimeo.com/play_redirect?clip_id=%s&sig=%s&time=%s&quality=%s&codecs=%s&type=moogaloop_local&embed_location=" \
-                    %(video_id, sig, timestamp, video_quality, video_codec.upper())
-
-        return [{
-            'id':       video_id,
-            'url':      video_url,
-            'uploader': video_uploader,
-            'uploader_id': video_uploader_id,
-            'upload_date':  video_upload_date,
-            'title':    video_title,
-            'ext':      video_extension,
-            'thumbnail':    video_thumbnail,
-            'description':  video_description,
-        }]
-
-
-class ArteTvIE(InfoExtractor):
-    """arte.tv information extractor."""
-
-    _VALID_URL = r'(?:http://)?videos\.arte\.tv/(?:fr|de)/videos/.*'
-    _LIVE_URL = r'index-[0-9]+\.html$'
-
-    IE_NAME = u'arte.tv'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[arte.tv] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[arte.tv] %s: Extracting information' % video_id)
-
-    def fetch_webpage(self, url):
-        self._downloader.incre#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-from __future__ import absolute_import
-
-import datetime
-import netrc
-import os
-import re
-import socket
-import time
-import email.utils
-import xml.etree.ElementTree
-import random
-import math
-
-from .utils import *
-
-
-class InfoExtractor(object):
-    """Information Extractor class.
-
-    Information extractors are the classes that, given a URL, extract
-    information about the video (or videos) the URL refers to. This
-    information includes the real video URL, the video title, author and
-    others. The information is stored in a dictionary which is then
-    passed to the FileDownloader. The FileDownloader processes this
-    information possibly downloading the video to the file system, among
-    other possible outcomes.
-
-    The dictionaries must include the following fields:
-
-    id:             Video identifier.
-    url:            Final video URL.
-    title:          Video title, unescaped.
-    ext:            Video filename extension.
-    uploader:       Full name of the video uploader.
-    upload_date:    Video upload date (YYYYMMDD).
-
-    The following fields are optional:
-
-    format:         The video format, defaults to ext (used for --get-format)
-    thumbnail:      Full URL to a video thumbnail image.
-    description:    One-line video description.
-    uploader_id:    Nickname or id of the video uploader.
-    player_url:     SWF Player URL (used for rtmpdump).
-    subtitles:      The .srt file contents.
-    urlhandle:      [internal] The urlHandle to be used to download the file,
-                    like returned by urllib.request.urlopen
-
-    The fields should all be Unicode strings.
-
-    Subclasses of this one should re-define the _real_initialize() and
-    _real_extract() methods and define a _VALID_URL regexp.
-    Probably, they should also be added to the list of extractors.
-
-    _real_extract() must return a *list* of information dictionaries as
-    described above.
-
-    Finally, the _WORKING attribute should be set to False for broken IEs
-    in order to warn the users and skip the tests.
-    """
-
-    _ready = False
-    _downloader = None
-    _WORKING = True
-
-    def __init__(self, downloader=None):
-        """Constructor. Receives an optional downloader."""
-        self._ready = False
-        self.set_downloader(downloader)
-
-    def suitable(self, url):
-        """Receives a URL and returns True if suitable for this IE."""
-        return re.match(self._VALID_URL, url) is not None
-
-    def working(self):
-        """Getter method for _WORKING."""
-        return self._WORKING
-
-    def initialize(self):
-        """Initializes an instance (authentication, etc)."""
-        if not self._ready:
-            self._real_initialize()
-            self._ready = True
-
-    def extract(self, url):
-        """Extracts URL information and returns it in list of dicts."""
-        self.initialize()
-        return self._real_extract(url)
-
-    def set_downloader(self, downloader):
-        """Sets the downloader for this IE."""
-        self._downloader = downloader
-
-    def _real_initialize(self):
-        """Real initialization process. Redefine in subclasses."""
-        pass
-
-    def _real_extract(self, url):
-        """Real extraction process. Redefine in subclasses."""
-        pass
-
-    @property
-    def IE_NAME(self):
-        return type(self).__name__[:-2]
-
-class YoutubeIE(InfoExtractor):
-    """Information extractor for youtube.com."""
-
-    _VALID_URL = r"""^
-                     (
-                         (?:https?://)?                                       # http(s):// (optional)
-                         (?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/|
-                            tube\.majestyc\.net/)                             # the various hostnames, with wildcard subdomains
-                         (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
-                         (?!view_play_list|my_playlists|artist|playlist)      # ignore playlist URLs
-                         (?:                                                  # the various things that can precede the ID:
-                             (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
-                             |(?:                                             # or the v= param in all its forms
-                                 (?:watch(?:_popup)?(?:\.php)?)?              # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
-                                 (?:\?|\#!?)                                  # the params delimiter ? or # or #!
-                                 (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
-                                 v=
-                             )
-                         )?                                                   # optional -> youtube.com/xxxx is OK
-                     )?                                                       # all until now is optional -> you can pass the naked ID
-                     ([0-9A-Za-z_-]+)                                         # here is it! the YouTube video ID
-                     (?(1).+)?                                                # if we found the ID, everything can follow
-                     $"""
-    _LANG_URL = r'http://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
-    _LOGIN_URL = 'https://www.youtube.com/signup?next=/&gl=US&hl=en'
-    _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
-    _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
-    _NETRC_MACHINE = 'youtube'
-    # Listed in order of quality
-    _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
-    _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
-    _video_extensions = {
-        '13': '3gp',
-        '17': 'mp4',
-        '18': 'mp4',
-        '22': 'mp4',
-        '37': 'mp4',
-        '38': 'video', # You actually don't know if this will be MOV, AVI or whatever
-        '43': 'webm',
-        '44': 'webm',
-        '45': 'webm',
-        '46': 'webm',
-    }
-    _video_dimensions = {
-        '5': '240x400',
-        '6': '???',
-        '13': '???',
-        '17': '144x176',
-        '18': '360x640',
-        '22': '720x1280',
-        '34': '360x640',
-        '35': '480x854',
-        '37': '1080x1920',
-        '38': '3072x4096',
-        '43': '360x640',
-        '44': '480x854',
-        '45': '720x1280',
-        '46': '1080x1920',
-    }
-    IE_NAME = u'youtube'
-
-    def suitable(self, url):
-        """Receives a URL and returns True if suitable for this IE."""
-        return re.match(self._VALID_URL, url, re.VERBOSE) is not None
-
-    def report_lang(self):
-        """Report attempt to set language."""
-        self._downloader.to_screen(u'[youtube] Setting language')
-
-    def report_login(self):
-        """Report attempt to log in."""
-        self._downloader.to_screen(u'[youtube] Logging in')
-
-    def report_age_confirmation(self):
-        """Report attempt to confirm age."""
-        self._downloader.to_screen(u'[youtube] Confirming age')
-
-    def report_video_webpage_download(self, video_id):
-        """Report attempt to download video webpage."""
-        self._downloader.to_screen(u'[youtube] %s: Downloading video webpage' % video_id)
-
-    def report_video_info_webpage_download(self, video_id):
-        """Report attempt to download video info webpage."""
-        self._downloader.to_screen(u'[youtube] %s: Downloading video info webpage' % video_id)
-
-    def report_video_subtitles_download(self, video_id):
-        """Report attempt to download video info webpage."""
-        self._downloader.to_screen(u'[youtube] %s: Downloading video subtitles' % video_id)
-
-    def report_information_extraction(self, video_id):
-        """Report attempt to extract video information."""
-        self._downloader.to_screen(u'[youtube] %s: Extracting video information' % video_id)
-
-    def report_unavailable_format(self, video_id, format):
-        """Report extracted video URL."""
-        self._downloader.to_screen(u'[youtube] %s: Format %s not available' % (video_id, format))
-
-    def report_rtmp_download(self):
-        """Indicate the download will use the RTMP protocol."""
-        self._downloader.to_screen(u'[youtube] RTMP download detected')
-
-    def _closed_captions_xml_to_srt(self, xml_string):
-        srt = ''
-        texts = re.findall(r'<text start="([\d\.]+)"( dur="([\d\.]+)")?>([^<]+)</text>', xml_string, re.MULTILINE)
-        # TODO parse xml instead of regex
-        for n, (start, dur_tag, dur, caption) in enumerate(texts):
-            if not dur: dur = '4'
-            start = float(start)
-            end = start + float(dur)
-            start = "%02i:%02i:%02i,%03i" %(start/(60*60), start/60%60, start%60, start%1*1000)
-            end = "%02i:%02i:%02i,%03i" %(end/(60*60), end/60%60, end%60, end%1*1000)
-            caption = unescapeHTML(caption)
-            caption = unescapeHTML(caption) # double cycle, intentional
-            srt += str(n+1) + '\n'
-            srt += start + ' --> ' + end + '\n'
-            srt += caption + '\n\n'
-        return srt
-
-    def _extract_subtitles(self, video_id):
-        self.report_video_subtitles_download(video_id)
-        request = compat_urllib_request.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
-        try:
-            srt_list = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            return (u'WARNING: unable to download video subtitles: %s' % compat_str(err), None)
-        srt_lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', srt_list)
-        srt_lang_list = dict((l[1], l[0]) for l in srt_lang_list)
-        if not srt_lang_list:
-            return (u'WARNING: video has no closed captions', None)
-        if self._downloader.params.get('subtitleslang', False):
-            srt_lang = self._downloader.params.get('subtitleslang')
-        elif 'en' in srt_lang_list:
-            srt_lang = 'en'
-        else:
-            srt_lang = list(srt_lang_list.keys())[0]
-        if not srt_lang in srt_lang_list:
-            return (u'WARNING: no closed captions found in the specified language', None)
-        request = compat_urllib_request.Request('http://www.youtube.com/api/timedtext?lang=%s&name=%s&v=%s' % (srt_lang, srt_lang_list[srt_lang], video_id))
-        try:
-            srt_xml = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            return (u'WARNING: unable to download video subtitles: %s' % compat_str(err), None)
-        if not srt_xml:
-            return (u'WARNING: unable to download video subtitles', None)
-        return (None, self._closed_captions_xml_to_srt(srt_xml))
-
-    def _print_formats(self, formats):
-        print('Available formats:')
-        for x in formats:
-            print('%s\t:\t%s\t[%s]' %(x, self._video_extensions.get(x, 'flv'), self._video_dimensions.get(x, '???')))
-
-    def _real_initialize(self):
-        if self._downloader is None:
-            return
-
-        username = None
-        password = None
-        downloader_params = self._downloader.params
-
-        # Attempt to use provided username and password or .netrc data
-        if downloader_params.get('username', None) is not None:
-            username = downloader_params['username']
-            password = downloader_params['password']
-        elif downloader_params.get('usenetrc', False):
-            try:
-                info = netrc.netrc().authenticators(self._NETRC_MACHINE)
-                if info is not None:
-                    username = info[0]
-                    password = info[2]
-                else:
-                    raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
-            except (IOError, netrc.NetrcParseError) as err:
-                self._downloader.to_stderr(u'WARNING: parsing .netrc: %s' % compat_str(err))
-                return
-
-        # Set language
-        request = compat_urllib_request.Request(self._LANG_URL)
-        try:
-            self.report_lang()
-            compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.to_stderr(u'WARNING: unable to set language: %s' % compat_str(err))
-            return
-
-        # No authentication to be performed
-        if username is None:
-            return
-
-        # Log in
-        login_form = {
-                'current_form': 'loginForm',
-                'next':     '/',
-                'action_login': 'Log In',
-                'username': username,
-                'password': password,
-                }
-        request = compat_urllib_request.Request(self._LOGIN_URL, compat_urllib_parse.urlencode(login_form))
-        try:
-            self.report_login()
-            login_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
-            if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
-                self._downloader.to_stderr(u'WARNING: unable to log in: bad username or password')
-                return
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.to_stderr(u'WARNING: unable to log in: %s' % compat_str(err))
-            return
-
-        # Confirm age
-        age_form = {
-                'next_url':     '/',
-                'action_confirm':   'Confirm',
-                }
-        request = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
-        try:
-            self.report_age_confirmation()
-            age_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable to confirm age: %s' % compat_str(err))
-            return
-
-    def _extract_id(self, url):
-        mobj = re.match(self._VALID_URL, url, re.VERBOSE)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-            return
-        video_id = mobj.group(2)
-        return video_id
-
-    def _real_extract(self, url):
-        # Extract original video URL from URL with redirection, like age verification, using next_url parameter
-        mobj = re.search(self._NEXT_URL_RE, url)
-        if mobj:
-            url = 'http://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
-        video_id = self._extract_id(url)
-
-        # Get video webpage
-        self.report_video_webpage_download(video_id)
-        url = 'http://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
-        request = compat_urllib_request.Request(url)
-        try:
-            video_webpage_bytes = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % compat_str(err))
-            return
-
-        video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
-
-        # Attempt to extract SWF player URL
-        mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
-        if mobj is not None:
-            player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
-        else:
-            player_url = None
-
-        # Get video info
-        self.report_video_info_webpage_download(video_id)
-        for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
-            video_info_url = ('http://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
-                    % (video_id, el_type))
-            request = compat_urllib_request.Request(video_info_url)
-            try:
-                video_info_webpage_bytes = compat_urllib_request.urlopen(request).read()
-                video_info_webpage = video_info_webpage_bytes.decode('utf-8', 'ignore')
-                video_info = compat_parse_qs(video_info_webpage)
-                if 'token' in video_info:
-                    break
-            except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-                self._downloader.trouble(u'ERROR: unable to download video info webpage: %s' % compat_str(err))
-                return
-        if 'token' not in video_info:
-            if 'reason' in video_info:
-                self._downloader.trouble(u'ERROR: YouTube said: %s' % video_info['reason'][0])
-            else:
-                self._downloader.trouble(u'ERROR: "token" parameter not in video info for unknown reason')
-            return
-
-        # Check for "rental" videos
-        if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
-            self._downloader.trouble(u'ERROR: "rental" videos not supported')
-            return
-
-        # Start extracting information
-        self.report_information_extraction(video_id)
-
-        # uploader
-        if 'author' not in video_info:
-            self._downloader.trouble(u'ERROR: unable to extract uploader name')
-            return
-        video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
-
-        # uploader_id
-        video_uploader_id = None
-        mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/user/([^"]+)">', video_webpage)
-        if mobj is not None:
-            video_uploader_id = mobj.group(1)
-        else:
-            self._downloader.trouble(u'WARNING: unable to extract uploader nickname')
-
-        # title
-        if 'title' not in video_info:
-            self._downloader.trouble(u'ERROR: unable to extract video title')
-            return
-        video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
-
-        # thumbnail image
-        if 'thumbnail_url' not in video_info:
-            self._downloader.trouble(u'WARNING: unable to extract video thumbnail')
-            video_thumbnail = ''
-        else:   # don't panic if we can't find it
-            video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
-
-        # upload date
-        upload_date = None
-        mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
-        if mobj is not None:
-            upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
-            format_expressions = ['%d %B %Y', '%B %d %Y', '%b %d %Y']
-            for expression in format_expressions:
-                try:
-                    upload_date = datetime.datetime.strptime(upload_date, expression).strftime('%Y%m%d')
-                except:
-                    pass
-
-        # description
-        video_description = get_element_by_id("eow-description", video_webpage)
-        if video_description:
-            video_description = clean_html(video_description)
-        else:
-            video_description = ''
-
-        # closed captions
-        video_subtitles = None
-        if self._downloader.params.get('writesubtitles', False):
-            (srt_error, video_subtitles) = self._extract_subtitles(video_id)
-            if srt_error:
-                self._downloader.trouble(srt_error)
-
-        if 'length_seconds' not in video_info:
-            self._downloader.trouble(u'WARNING: unable to extract video duration')
-            video_duration = ''
-        else:
-            video_duration = compat_urllib_parse.unquote_plus(video_info['length_seconds'][0])
-
-        # token
-        video_token = compat_urllib_parse.unquote_plus(video_info['token'][0])
-
-        # Decide which formats to download
-        req_format = self._downloader.params.get('format', None)
-
-        if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
-            self.report_rtmp_download()
-            video_url_list = [(None, video_info['conn'][0])]
-        elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
-            url_data_strs = video_info['url_encoded_fmt_stream_map'][0].split(',')
-            url_data = [compat_parse_qs(uds) for uds in url_data_strs]
-            url_data = [ud for ud in url_data if 'itag' in ud and 'url' in ud]
-            url_map = dict((ud['itag'][0], ud['url'][0] + '&signature=' + ud['sig'][0]) for ud in url_data)
-
-            format_limit = self._downloader.params.get('format_limit', None)
-            available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
-            if format_limit is not None and format_limit in available_formats:
-                format_list = available_formats[available_formats.index(format_limit):]
-            else:
-                format_list = available_formats
-            existing_formats = [x for x in format_list if x in url_map]
-            if len(existing_formats) == 0:
-                self._downloader.trouble(u'ERROR: no known formats available for video')
-                return
-            if self._downloader.params.get('listformats', None):
-                self._print_formats(existing_formats)
-                return
-            if req_format is None or req_format == 'best':
-                video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
-            elif req_format == 'worst':
-                video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
-            elif req_format in ('-1', 'all'):
-                video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
-            else:
-                # Specific formats. We pick the first in a slash-delimeted sequence.
-                # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
-                req_formats = req_format.split('/')
-                video_url_list = None
-                for rf in req_formats:
-                    if rf in url_map:
-                        video_url_list = [(rf, url_map[rf])]
-                        break
-                if video_url_list is None:
-                    self._downloader.trouble(u'ERROR: requested format not available')
-                    return
-        else:
-            self._downloader.trouble(u'ERROR: no conn or url_encoded_fmt_stream_map information found in video info')
-            return
-
-        results = []
-        for format_param, video_real_url in video_url_list:
-            # Extension
-            video_extension = self._video_extensions.get(format_param, 'flv')
-
-            video_format = '{0} - {1}'.format(format_param if format_param else video_extension,
-                                              self._video_dimensions.get(format_param, '???'))
-
-            results.append({
-                'id':       video_id,
-                'url':      video_real_url,
-                'uploader': video_uploader,
-                'uploader_id': video_uploader_id,
-                'upload_date':  upload_date,
-                'title':    video_title,
-                'ext':      video_extension,
-                'format':   video_format,
-                'thumbnail':    video_thumbnail,
-                'description':  video_description,
-                'player_url':   player_url,
-                'subtitles':    video_subtitles,
-                'duration':     video_duration
-            })
-        return results
-
-
-class MetacafeIE(InfoExtractor):
-    """Information Extractor for metacafe.com."""
-
-    _VALID_URL = r'(?:http://)?(?:www\.)?metacafe\.com/watch/([^/]+)/([^/]+)/.*'
-    _DISCLAIMER = 'http://www.metacafe.com/family_filter/'
-    _FILTER_POST = 'http://www.metacafe.com/f/index.php?inputType=filter&controllerGroup=user'
-    IE_NAME = u'metacafe'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_disclaimer(self):
-        """Report disclaimer retrieval."""
-        self._downloader.to_screen(u'[metacafe] Retrieving disclaimer')
-
-    def report_age_confirmation(self):
-        """Report attempt to confirm age."""
-        self._downloader.to_screen(u'[metacafe] Confirming age')
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[metacafe] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[metacafe] %s: Extracting information' % video_id)
-
-    def _real_initialize(self):
-        # Retrieve disclaimer
-        request = compat_urllib_request.Request(self._DISCLAIMER)
-        try:
-            self.report_disclaimer()
-            disclaimer = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable to retrieve disclaimer: %s' % compat_str(err))
-            return
-
-        # Confirm age
-        disclaimer_form = {
-            'filters': '0',
-            'submit': "Continue - I'm over 18",
-            }
-        request = compat_urllib_request.Request(self._FILTER_POST, compat_urllib_parse.urlencode(disclaimer_form))
-        try:
-            self.report_age_confirmation()
-            disclaimer = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable to confirm age: %s' % compat_str(err))
-            return
-
-    def _real_extract(self, url):
-        # Extract id and simplified title from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(1)
-
-        # Check if video comes from YouTube
-        mobj2 = re.match(r'^yt-(.*)$', video_id)
-        if mobj2 is not None:
-            self._downloader.download(['http://www.youtube.com/watch?v=%s' % mobj2.group(1)])
-            return
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request('http://www.metacafe.com/watch/%s/' % video_id)
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract URL, uploader and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'(?m)&mediaURL=([^&]+)', webpage)
-        if mobj is not None:
-            mediaURL = compat_urllib_parse.unquote(mobj.group(1))
-            video_extension = mediaURL[-3:]
-
-            # Extract gdaKey if available
-            mobj = re.search(r'(?m)&gdaKey=(.*?)&', webpage)
-            if mobj is None:
-                video_url = mediaURL
-            else:
-                gdaKey = mobj.group(1)
-                video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
-        else:
-            mobj = re.search(r' name="flashvars" value="(.*?)"', webpage)
-            if mobj is None:
-                self._downloader.trouble(u'ERROR: unable to extract media URL')
-                return
-            vardict = compat_parse_qs(mobj.group(1))
-            if 'mediaData' not in vardict:
-                self._downloader.trouble(u'ERROR: unable to extract media URL')
-                return
-            mobj = re.search(r'"mediaURL":"(http.*?)","key":"(.*?)"', vardict['mediaData'][0])
-            if mobj is None:
-                self._downloader.trouble(u'ERROR: unable to extract media URL')
-                return
-            mediaURL = mobj.group(1).replace('\\/', '/')
-            video_extension = mediaURL[-3:]
-            video_url = '%s?__gda__=%s' % (mediaURL, mobj.group(2))
-
-        mobj = re.search(r'(?im)<title>(.*) - Video</title>', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract title')
-            return
-        video_title = mobj.group(1).decode('utf-8')
-
-        mobj = re.search(r'submitter=(.*?);', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
-            return
-        video_uploader = mobj.group(1)
-
-        return [{
-            'id':       video_id.decode('utf-8'),
-            'url':      video_url.decode('utf-8'),
-            'uploader': video_uploader.decode('utf-8'),
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension.decode('utf-8'),
-        }]
-
-
-class DailymotionIE(InfoExtractor):
-    """Information Extractor for Dailymotion"""
-
-    _VALID_URL = r'(?i)(?:https?://)?(?:www\.)?dailymotion\.[a-z]{2,3}/video/([^/]+)'
-    IE_NAME = u'dailymotion'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[dailymotion] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[dailymotion] %s: Extracting information' % video_id)
-
-    def _real_extract(self, url):
-        # Extract id and simplified title from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(1).split('_')[0].split('?')[0]
-
-        video_extension = 'mp4'
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url)
-        request.add_header('Cookie', 'family_filter=off')
-        try:
-            self.report_download_webpage(video_id)
-            webpage_bytes = compat_urllib_request.urlopen(request).read()
-            webpage = webpage_bytes.decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract URL, uploader and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'\s*var flashvars = (.*)', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract media URL')
-            return
-        flashvars = compat_urllib_parse.unquote(mobj.group(1))
-
-        for key in ['hd1080URL', 'hd720URL', 'hqURL', 'sdURL', 'ldURL', 'video_url']:
-            if key in flashvars:
-                max_quality = key
-                self._downloader.to_screen(u'[dailymotion] Using %s' % key)
-                break
-        else:
-            self._downloader.trouble(u'ERROR: unable to extract video URL')
-            return
-
-        mobj = re.search(r'"' + max_quality + r'":"(.+?)"', flashvars)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video URL')
-            return
-
-        video_url = compat_urllib_parse.unquote(mobj.group(1)).replace('\\/', '/')
-
-        # TODO: support choosing qualities
-
-        mobj = re.search(r'<meta property="og:title" content="(?P<title>[^"]*)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract title')
-            return
-        video_title = unescapeHTML(mobj.group('title'))
-
-        video_uploader = None
-        mobj = re.search(r'(?im)<span class="owner[^\"]+?">[^<]+?<a [^>]+?>([^<]+?)</a>', webpage)
-        if mobj is None:
-            # lookin for official user
-            mobj_official = re.search(r'<span rel="author"[^>]+?>([^<]+?)</span>', webpage)
-            if mobj_official is None:
-                self._downloader.trouble(u'WARNING: unable to extract uploader nickname')
-            else:
-                video_uploader = mobj_official.group(1)
-        else:
-            video_uploader = mobj.group(1)
-
-        video_upload_date = None
-        mobj = re.search(r'<div class="[^"]*uploaded_cont[^"]*" title="[^"]*">([0-9]{2})-([0-9]{2})-([0-9]{4})</div>', webpage)
-        if mobj is not None:
-            video_upload_date = mobj.group(3) + mobj.group(2) + mobj.group(1)
-
-        return [{
-            'id':       video_id,
-            'url':      video_url,
-            'uploader': video_uploader,
-            'upload_date':  video_upload_date,
-            'title':    video_title,
-            'ext':      video_extension,
-        }]
-
-
-class PhotobucketIE(InfoExtractor):
-    """Information extractor for photobucket.com."""
-
-    _VALID_URL = r'(?:http://)?(?:[a-z0-9]+\.)?photobucket\.com/.*[\?\&]current=(.*\.flv)'
-    IE_NAME = u'photobucket'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[photobucket] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[photobucket] %s: Extracting information' % video_id)
-
-    def _real_extract(self, url):
-        # Extract id from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(1)
-
-        video_extension = 'flv'
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url)
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract URL, uploader, and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'<link rel="video_src" href=".*\?file=([^"]+)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract media URL')
-            return
-        mediaURL = compat_urllib_parse.unquote(mobj.group(1))
-
-        video_url = mediaURL
-
-        mobj = re.search(r'<title>(.*) video by (.*) - Photobucket</title>', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract title')
-            return
-        video_title = mobj.group(1).decode('utf-8')
-
-        video_uploader = mobj.group(2).decode('utf-8')
-
-        return [{
-            'id':       video_id.decode('utf-8'),
-            'url':      video_url.decode('utf-8'),
-            'uploader': video_uploader,
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension.decode('utf-8'),
-        }]
-
-
-class YahooIE(InfoExtractor):
-    """Information extractor for video.yahoo.com."""
-
-    _WORKING = False
-    # _VALID_URL matches all Yahoo! Video URLs
-    # _VPAGE_URL matches only the extractable '/watch/' URLs
-    _VALID_URL = r'(?:http://)?(?:[a-z]+\.)?video\.yahoo\.com/(?:watch|network)/([0-9]+)(?:/|\?v=)([0-9]+)(?:[#\?].*)?'
-    _VPAGE_URL = r'(?:http://)?video\.yahoo\.com/watch/([0-9]+)/([0-9]+)(?:[#\?].*)?'
-    IE_NAME = u'video.yahoo'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[video.yahoo] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[video.yahoo] %s: Extracting information' % video_id)
-
-    def _real_extract(self, url, new_video=True):
-        # Extract ID from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(2)
-        video_extension = 'flv'
-
-        # Rewrite valid but non-extractable URLs as
-        # extractable English language /watch/ URLs
-        if re.match(self._VPAGE_URL, url) is None:
-            request = compat_urllib_request.Request(url)
-            try:
-                webpage = compat_urllib_request.urlopen(request).read()
-            except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-                self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-                return
-
-            mobj = re.search(r'\("id", "([0-9]+)"\);', webpage)
-            if mobj is None:
-                self._downloader.trouble(u'ERROR: Unable to extract id field')
-                return
-            yahoo_id = mobj.group(1)
-
-            mobj = re.search(r'\("vid", "([0-9]+)"\);', webpage)
-            if mobj is None:
-                self._downloader.trouble(u'ERROR: Unable to extract vid field')
-                return
-            yahoo_vid = mobj.group(1)
-
-            url = 'http://video.yahoo.com/watch/%s/%s' % (yahoo_vid, yahoo_id)
-            return self._real_extract(url, new_video=False)
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url)
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract uploader and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'<meta name="title" content="(.*)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video title')
-            return
-        video_title = mobj.group(1).decode('utf-8')
-
-        mobj = re.search(r'<h2 class="ti-5"><a href="http://video\.yahoo\.com/(people|profile)/[0-9]+" beacon=".*">(.*)</a></h2>', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video uploader')
-            return
-        video_uploader = mobj.group(1).decode('utf-8')
-
-        # Extract video thumbnail
-        mobj = re.search(r'<link rel="image_src" href="(.*)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
-            return
-        video_thumbnail = mobj.group(1).decode('utf-8')
-
-        # Extract video description
-        mobj = re.search(r'<meta name="description" content="(.*)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video description')
-            return
-        video_description = mobj.group(1).decode('utf-8')
-        if not video_description:
-            video_description = 'No description available.'
-
-        # Extract video height and width
-        mobj = re.search(r'<meta name="video_height" content="([0-9]+)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video height')
-            return
-        yv_video_height = mobj.group(1)
-
-        mobj = re.search(r'<meta name="video_width" content="([0-9]+)" />', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: unable to extract video width')
-            return
-        yv_video_width = mobj.group(1)
-
-        # Retrieve video playlist to extract media URL
-        # I'm not completely sure what all these options are, but we
-        # seem to need most of them, otherwise the server sends a 401.
-        yv_lg = 'R0xx6idZnW2zlrKP8xxAIR'  # not sure what this represents
-        yv_bitrate = '700'  # according to Wikipedia this is hard-coded
-        request = compat_urllib_request.Request('http://cosmos.bcst.yahoo.com/up/yep/process/getPlaylistFOP.php?node_id=' + video_id +
-                '&tech=flash&mode=playlist&lg=' + yv_lg + '&bitrate=' + yv_bitrate + '&vidH=' + yv_video_height +
-                '&vidW=' + yv_video_width + '&swf=as3&rd=video.yahoo.com&tk=null&adsupported=v1,v2,&eventid=1301797')
-        try:
-            self.report_download_webpage(video_id)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Extract media URL from playlist XML
-        mobj = re.search(r'<STREAM APP="(http://.*)" FULLPATH="/?(/.*\.flv\?[^"]*)"', webpage)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Unable to extract media URL')
-            return
-        video_url = compat_urllib_parse.unquote(mobj.group(1) + mobj.group(2)).decode('utf-8')
-        video_url = unescapeHTML(video_url)
-
-        return [{
-            'id':       video_id.decode('utf-8'),
-            'url':      video_url,
-            'uploader': video_uploader,
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension.decode('utf-8'),
-            'thumbnail':    video_thumbnail.decode('utf-8'),
-            'description':  video_description,
-        }]
-
-
-class VimeoIE(InfoExtractor):
-    """Information extractor for vimeo.com."""
-
-    # _VALID_URL matches Vimeo URLs
-    _VALID_URL = r'(?:https?://)?(?:(?:www|player).)?vimeo\.com/(?:(?:groups|album)/[^/]+/)?(?:videos?/)?([0-9]+)'
-    IE_NAME = u'vimeo'
-
-    def __init__(self, downloader=None):
-        InfoExtractor.__init__(self, downloader)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self._downloader.to_screen(u'[vimeo] %s: Downloading webpage' % video_id)
-
-    def report_extraction(self, video_id):
-        """Report information extraction."""
-        self._downloader.to_screen(u'[vimeo] %s: Extracting information' % video_id)
-
-    def _real_extract(self, url, new_video=True):
-        # Extract ID from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-            return
-
-        video_id = mobj.group(1)
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url, None, std_headers)
-        try:
-            self.report_download_webpage(video_id)
-            webpage_bytes = compat_urllib_request.urlopen(request).read()
-            webpage = webpage_bytes.decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % compat_str(err))
-            return
-
-        # Now we begin extracting as much information as we can from what we
-        # retrieved. First we extract the information common to all extractors,
-        # and latter we extract those that are Vimeo specific.
-        self.report_extraction(video_id)
-
-        # Extract the config JSON
-        try:
-            config = webpage.split(' = {config:')[1].split(',assets:')[0]
-            config = json.loads(config)
-        except:
-            self._downloader.trouble(u'ERROR: unable to extract info section')
-            return
-
-        # Extract title
-        video_title = config["video"]["title"]
-
-        # Extract uploader and uploader_id
-        video_uploader = config["video"]["owner"]["name"]
-        video_uploader_id = config["video"]["owner"]["url"].split('/')[-1]
-
-        # Extract video thumbnail
-        video_thumbnail = config["video"]["thumbnail"]
-
-        # Extract video description
-        video_description = get_element_by_attribute("itemprop", "description", webpage)
-        if video_description: video_description = clean_html(video_description)
-        else: video_description = ''
-
-        # Extract upload date
-        video_upload_date = None
-        mobj = re.search(r'<meta itemprop="dateCreated" content="(\d{4})-(\d{2})-(\d{2})T', webpage)
-        if mobj is not None:
-            video_upload_date = mobj.group(1) + mobj.group(2) + mobj.group(3)
-
-        # Vimeo specific: extract request signature and timestamp
-        sig = config['request']['signature']
-        timestamp = config['request']['timestamp']
-
-        # Vimeo specific: extract video codec and quality information
-        # First consider quality, then codecs, then take everything
-        # TODO bind to format param
-        codecs = [('h264', 'mp4'), ('vp8', 'flv'), ('vp6', 'flv')]
-        files = { 'hd': [], 'sd': [], 'other': []}
-        for codec_name, codec_extension in codecs:
-            if codec_name in config["video"]["files"]:
-                if 'hd' in config["video"]["files"][codec_name]:
-                    files['hd'].append((codec_name, codec_extension, 'hd'))
-                elif 'sd' in config["video"]["files"][codec_name]:
-                    files['sd'].append((codec_name, codec_extension, 'sd'))
-                else:
-                    files['other'].append((codec_name, codec_extension, config["video"]["files"][codec_name][0]))
-
-        for quality in ('hd', 'sd', 'other'):
-            if len(files[quality]) > 0:
-                video_quality = files[quality][0][2]
-                video_codec = files[quality][0][0]
-                video_extension = files[quality][0][1]
-                self._downloader.to_screen(u'[vimeo] %s: Downloading %s file at %s quality' % (video_id, video_codec.upper(), video_quality))
-                break
-        else:
-            self._downloader.trouble(u'ERROR: no known codec found')
-            return
-
-        video_url = "http://player.vimeo.com/play_redirect?clip_id=%s&sig=%s&time=%s&quality=%s&codecs=%s&type=moogaloop_local&embed_location=" \
-                    %(video_id, sig, timestamp, video_quality, video_codec.upper())
-
-        return [{
-            'id':       video_id,
-            'url':      video_url,
-            'uploader': video_uploader,
-            'uploader_id': video_uploader_id,
-            'upload_date':  video_upload_date,
-            'title':    video_title,
-            'ext':      video_extension,
-            'thumbnail':    video_thumbnail,
-            'description':  video_description,
-        }]
-
-
 class ArteTvIE(InfoExtractor):
     """arte.tv information extractor."""