.avi
An .avi file is a movie clip file format. To play an .avi movie, your PC needs a recent version of Media Player. This application comes with Windows and should be located in your Windows directory (the file name is mplayer.exe).

MPEG
MPEG stands for Moving Picture Expert Group. To play an .mpg movie, your PC needs a recent version of Media Player. This application comes with Windows and should be located in your Windows directory (the file name is mplayer.exe).

QuickTime for Windows
Apple Computer's QuickTime for Windows allows you to view downloaded QuickTime movies. In some recent versions of certain browsers, it also lets you view movies right in the browser window, without having to download the movie file first. You can download QuickTime for Windows from our Internet Tools page.