Saving a Youtube playlist as mp3 files is easy with Linux. The youtube-dl script is capable of handling this easily. You need to specify the playlist ID instead of the whole URL.
Below is an example, this shows how easy it is to save a bunch of videos as mp3 files.
┌──[jason@192.168.1.2]─[~/Music/newyoutube] └──╼ ╼ $ youtube-dl -x --audio-format "mp3" --embed-thumbnail --yes-playlist --output "%(title)s.%(ext)s" -i PL094EFA8AA73C042B |
This works perfectly, and the Youtube thumbnail is embedded, so the files have artwork as well. This is the best way to save a music collection on Youtube to your private machine.
So give this a go today, this is very useful.