+ -o, --output TEMPLATE output filename template. Use %(stitle)s to get the
+ title, %(uploader)s for the uploader name,
+ %(autonumber)s to get an automatically incremented
+ number, %(ext)s for the filename extension,
+ %(upload_date)s for the upload date (YYYYMMDD), and
+ %% for a literal percent. Use - to output to
+ stdout.