Waching movies on a Sony cybershot!

[Barret]

I was wondering is there a way to compress a movie, save it in a memory stick and play it on the camera? I heard people playing dvd movies (recompressed) on smart phones!
I have Dsc-p8, well if i compress a movie , lets say with virtual dub or premiere, can i make it play on the camera?

I have found that the camera (DSC-P8) reproduces Mpeg-1 movies at 640x480 resolution, with a filename like: mov0001.mpg.
The QUESTION is does it only play movies made with the camera or other movies too at the right format?