+ debug_printtraffic:Print out sent and received HTTP traffic
+ include_ads: Download ads as well
+ default_search: Prepend this string if an input url is not valid.
+ 'auto' for elaborate guessing
+ encoding: Use this encoding instead of the system-specified.
+ extract_flat: Do not resolve URLs, return the immediate result.
+ Pass in 'in_playlist' to only show this behavior for
+ playlist items.
+ postprocessors: A list of dictionaries, each with an entry
+ * key: The name of the postprocessor. See
+ youtube_dl/postprocessor/__init__.py for a list.
+ as well as any further keyword arguments for the
+ postprocessor.
+ progress_hooks: A list of functions that get called on download
+ progress, with a dictionary with the entries
+ * status: One of "downloading" and "finished".
+ Check this first and ignore unknown values.
+
+ If status is one of "downloading" or "finished", the
+ following properties may also be present:
+ * filename: The final filename (always present)
+ * downloaded_bytes: Bytes on disk
+ * total_bytes: Size of the whole file, None if unknown
+ * tmpfilename: The filename we're currently writing to
+ * eta: The estimated time in seconds, None if unknown
+ * speed: The download speed in bytes/second, None if
+ unknown
+
+ Progress hooks are guaranteed to be called at least once
+ (with status "finished") if the download is successful.
+ merge_output_format: Extension to use when merging formats.
+ fixup: Automatically correct known faults of the file.
+ One of:
+ - "never": do nothing
+ - "warn": only emit a warning
+ - "detect_or_warn": check whether we can do anything
+ about it, warn otherwise (default)
+ source_address: (Experimental) Client-side IP address to bind to.
+ call_home: Boolean, true iff we are allowed to contact the
+ youtube-dl servers for debugging.
+ sleep_interval: Number of seconds to sleep before each download.
+ external_downloader: Executable of the external downloader to call.
+ listformats: Print an overview of available video formats and exit.
+ list_thumbnails: Print a table of all thumbnails and exit.
+