You create videos with programs such as 'muvee' or 'MyVideo' and various others....

In this program you are asked to select a video/s then you select music, then style in which you want the video to be made for Ex: black & white, color, fast cuts, slow cuts etc. etc. etc.

The videos (also you can add pictures), and music are chosen from your P.C. so whatever songs and fights you have stored in your PC you can use them....

Not full explanation but a pretty rough idea.....