How is this done? Targeting Flash Video from HTML

Check out this page...
http://www.nfl.com/videos

See on the bottom you can click on a HTML thumbnail and it loads a video into the video player. I'm trying to figure out how this can be done. I like it because it doesn't actually reload the page, it just reloads the video in the player.

Right now I have a video player on this page...
http://www.worldbank.org/broadcast

I want to create something similar...where I can have some thumbnails underneath the video player that when clicked, will load into the player. As you can see I have thumbnails, but they part of the actual swf file and loaded in via XML. I'm having trouble finding any resources on activating flash video from an html link. Any ideas? Thanks