This page will introduce you to how to incorporate music in your videos by using music in the public domain. This is the first subpage and first step to using music in videos in a legal and ethical manner..
If you can, find musical compositions and sound recordings in the public domain.
Unfortunately, the large majority of sound recordings will not enter the public domain until 2067!
However, if you're musically inclined, you can find musical compositions in the public domain (i.e., they were composed before 1923) and then perform and record them yourself.
The public domain page on the K-State copyright website covers information on what the public domain is and how long copyright terms last, and resources for determining copyright status of works and for finding works in the public domain.