Below are some helpful links on Copyright Laws

Cyber Bee 
http://www.cyberbee.com/cb_copyright.swf

Welcome To Copyright Kids
http://www.copyrightkids.org/

Taking the Mystery Out of Copyright
http://www.loc.gov/teachers/copyrightmystery/#

What is Copyright Music Video
http://mediaeducationlab.com/1-whats-copyright-music-video

User Rights, Section 107 Music Video
http://mediaeducationlab.com/2-user-rights-section-107-music-video