Sure,
I have 23 videos I need to show. Instead of creating 23 pages with each video embed targeting a different video, I rather have just ONE page and via the URL tell the player what to load. This way I can just have 23 custom links but just one player and one html page.
I first read of this in the swfObject page:
(scroll down to "Passing variables into your movies using the “Flashvars” parameter" section)