'%(format)s for the format description (like "22 - 1280x720" or "HD"), '
'%(format_id)s for the unique id of the format (like YouTube\'s itags: "137"), '
'%(upload_date)s for the upload date (YYYYMMDD), '
- '%(extractor)s for the provider (YouTube, metacafe, etc), '
+ '%(extractor)s for the provider (youtube, metacafe, etc), '
'%(id)s for the video id, '
'%(playlist_title)s, %(playlist_id)s, or %(playlist)s (=title if present, ID otherwise) for the playlist the video is in, '
'%(playlist_index)s for the position in the playlist. '