%(autonumber)s to get an automatically incremented
number, %(ext)s for the filename extension,
%(upload_date)s for the upload date (YYYYMMDD),
- %(provider)s for the provider (youtube, metacafe,
+ %(extractor)s for the provider (youtube, metacafe,
etc), %(id)s for the video id and %% for a literal
percent. Use - to output to stdout.
-a, --batch-file FILE file containing URLs to download ('-' for stdin)