How to download music from youtube: this works. There was a live performance of a particular song I really wanted. It was better than the studio mp3. So I found the performance on youtube and followed these tips, using mediaconverter.org and converted it to an mp3. It worked.:
Take all or part of any YouTube video and convert it to a permanent file on your computer for classroom use. You never have to worry again about your school wifi connection or speed! No internet connection required to show the video!!