'%(extractor)s for the provider (youtube, metacafe, etc), '
'%(id)s for the video id, %(playlist)s for the playlist the video is in, '
'%(playlist_index)s for the position in the playlist and %% for a literal percent. '
'%(extractor)s for the provider (youtube, metacafe, etc), '
'%(id)s for the video id, %(playlist)s for the playlist the video is in, '
'%(playlist_index)s for the position in the playlist and %% for a literal percent. '