A VCD movie is stored in the popular MPEG (.MPG) format, that is also often used to download movies from the internet. But if a VCD disk is put in a computer, there is a file with a .MPG after the name, and many other files. This is because the movie is actually in a file (or files) that has .DAT after the name. This file can be played with Windows Media Player (or any other player that can play a .MPG movie), one does not need special software because the file is actually just a .MPG movie with a .DAT end of the name instead of .MPG. There are also many programs that can play a VCD on a PC.