youtube-dl

• https://github.com/ytdl-org/youtube-dl

• curl -L https://yt-dl.org/downloads/latest/youtube-dl -o ~/scripts/youtube-dl

• chmod 755 ~/scripts/youtube-dl

• youtube-dl -F https://www.youtube.com/watch?v=aaaa

• youtube-dl -f 249 https://www.youtube.com/watch?v=aaaa