Install yt-dlp on Windows
winget install yt-dlp
Install ffmpeg
winget install ffmpeg
Download a playlist and convert to mp3 audio files (--audio-quality: 0 for best quality, 10 for lowest quality)
yt-dlp --prefer-ffmpeg --extract-audio --audio-format mp3 --audio-quality 0 --embed-thumbnail -i REPLACE-YOUTUBE-PLAYLIST-ID-HERE