Does anyone know how to load videos onto the same HTML page without loading a new page for each video?

Right now I have to add a new page for every video, and play them in a frame: http://legacyhdv.com/new_middle.htm. I've come to find that it's killing me on the search engines, so I need a script to load my videos. Thoughts?

It seems like a javascript could load a new image/video into the same coordinates on a page without the need for loading a new html page. Does anyone do this?