i'm guessing you want to display a video in a page that also lists all the other videos you can view. If you click one of those other videos, you want to show that movie in the current page and show the list of all videos again.
I'm not sure how you show your video, but i'm guessing there is some HTML markup and a few things change: movie file name, width, height, title.
Sounds like you want a PHP page that access a database of movies, lists them all, and let you pick one to view.
Does that sound right?