Here are a few helpful video resources for ya.
Copyright and the Public DomainÂ (Public Domain Information Project)
Creative CommonsÂ (sharing and reuse of creativity and knowledge through the provision of free legal tools)
Public Domain MusicÂ (Public Domain Information Project)
Creative Commons MusicÂ (Understanding the use of CC music, and links to music resources)
Free Music ArchiveÂ – More Creative Commons goodness!
YouTube AudioÂ LibraryÂ – free music and effects for your YouTube videos.
Vimeo Music StoreÂ (Music for your video projects, some even free)