Any tutorials on how to create an FLV player w/ gallery to choose?

I know how to implement a flash video via importing and streaming off a site, what I am trying to find is how to create a customized menu (like a dropdown menu) where it will change the source of the video when chosen. Not sure how it would be done. I have gone to gotoandlearn.com but they just show how to create the actual video. anyone have any ideas?:ch: