Re: Legality of adding music?
Copyright law is vague, and I'm not highly educated in the field, but here's the law: http://www.freespeeches.net/fairuse.html So, say your movie pertained to the instruction of how to play that particular song, or an educational analysis of it, you would have a, in my opinion, sound legal backing for that use. Also, if you are "critizing" or "critical" of the piece of music, that would be fine as well. If you are explicitly or implicitly comparing that piece of music with other pieces of music, that might fly as well. Simply adding a copyrighted piece of music that goes well with your video, however, is typically a violation of U.S. Copyright law. If you really want to use it, contact the artist save the e-mail that says you can use it if they let you.