This is one of my most advanced, deepest, and most useful techniques. I show you how to isolate the color of a single object in moving video and swap it to anything you want. The magic is done with LAB color mode and tracking mattes. If you watch only one Motion Graphics or Video tutorial this month... this is it.
http://podcasts.creativecow.net/photoshop-tutorials-podcast/secondary-color-correction-with-lab