>>371
--get-filename を使えばそれっぽいことができるけどあんまりスマートじゃないね

$ youtube-dl --get-filename -o "%(upload_date)s" https://www.youtube.com/watch?v=jNQXAC9IVRw https://youtu.be/fRh_vgS2dFE
20050423
20151022

$ youtube-dl --get-filename -o "%(uploader_id)s" https://www.youtube.com/watch?v=jNQXAC9IVRw https://youtu.be/fRh_vgS2dFE
jawed
JustinBieberVEVO