media/multimedia/ YoutubeDl

Restricting resolution

youtube-dl -f best[height=1920] $URL # restrict to <= 1080p

Specifying format

youtube-dl -f best[ext=mp4] $URL # mp4 files

Combining specifications

youtube-dl -f best[ext=mp4,height=1920] $URL # restrict to <= 1080p, mp4 files