In general, all MPEG video files are widely compatible with many different programs like VLC Media Player, iTunes, Windows Media Player, and QuickTime. In most modern applications, opening MPEG files can be done by double-clicking the file and allowing the operating system (OS) to choose the best program to run it.
An OS that does not have a default program can automatically change to QuickTime for macOS or Windows Media Player for Windows. Sometimes, installing a new application can also immediately set associations with MPEG files. In some cases, it is best to download a third-party app like VLC Media Player that can open any kind of file, including MPEG.