How did CBS do that?

Okay, a lot of you folks watched the Superbowl yesterday. Without getting into a discussion of the game itself, can anyone figure out how CBS’s “Eyevision” worked? For those that don’t remember, this was a perspective they offered for instant replays. As the video was shown, the camera appeared to move freely around the player and the action. How in the world did they make something like that work?

It was one of the greatest things since the “Telestrator”!

http://cbs.sportsline.com/u/cbs/sports/news/012401eyevision.html

Thanks.