Check who owns it.
Get permission to use it.
Give credit to the creator.
Buy it (if necessary).
Use it responsibly.
You can only use a small amount of the work.
Audio clips up to 10%, but not more than 30 seconds.
Motion video up to 3 minutes.
No alterations.
You have to add new meaning to make it original.
Rework it in a totally different way.
Use it for nonprofit purposes.
Give credit to original creator.
An educational video on copyright by professor Eric Fadden at Bucknell University showing an example of how copyright works.