yt-dlp
Video
Audio
Download and extract best audio
yt-dlp -f bestaudio --extract-audio URL
Automation
Stream a video directly in a video player without saving to file
yt-dlp -o - URL | mpv -
# or vlc, or another video player
Download from a list inside a .txt file
# -a/--batch-file
yt-dlp -a links.txt