How to download highest quality MP3 from YouTube?

yt-dlp is a youtube-dl fork based on the now inactive youtube-dlc. The main focus of this project is adding new features and patches while also keeping up to date with the original project

Convert video files to audio-only files (requires ffmpeg and ffprobe)

Force audio quality to 320 kbps:

yt-dlp --extract-audio --audio-format mp3 --audio-quality 320k -o "%(title)s.mp3"\?v\=ZRUC1ZKao74


Download best available audio quality from YouTube with thumbnails:

yt-dlp -f bestaudio --extract-audio --audio-format mp3 --audio-quality 0 --embed-thumbnail -o "%(title)s.mp3"\?v\=Rvs9FzGzf8A