Intergrating FLV with flash setInterval -hOW 2?

Hi flashfellas

I want to know how adidas added the ““Player - Pope”” movie (flv) to work smoothly with time.
Link: http://www.adidas.com/us/campaigns/mls/content/default.asp#
Enter Site

Another example is Wendy’s http://www.bbv99.com/
After some time without mouse activity the video will play different animation

I think they use a green screen to capture the video, then extract. Layered over the background movie clip. And use setInterval method to play the flv. However the movieclip is smooth…

hOW 2?

Thanx