Do you ever wonder why:
Copyright is a federal law that gives creators of media the exclusive rights to copy, distribute, and mash up the things they create for a limited time. As you work on any assignment that includes digital media (e.g., images, video, or music) it is good practice to make sure you are abiding by copyright laws.
General resources on copyright law:
Prof. Eric Faden of Bucknell University (fairly) compiled clips from Disney movies to create a video explaining Fair Use. Double-click the video to see it larger in You Tube.