As others have said, youtube-dl. I'm using the following command to get them in the best possible quality and merge them into an mkv: youtube-dl -f bestvideo

As others have said, youtube-dl. I'm using the following command to get them in the best possible quality and merge them into an mkv: youtube-dl -f bestvideo+bestaudio --merge-output-format mkv -ci [play list url] I'm on MacOS and was able to get it working by doing the following: brew install youtube-dl brew install ffmpeg ffmpeg is needed for encoding. You can get playlists here: https://www.youtube.com/user/UCBerkeley/playlists https://www.youtube.com/user/UCBerkeley/playlists