Whether you are using a Windows PC or Mac, your computer may have a default media player like Windows Media Player or QuickTime Player. MP4 is one of the most popular and standard video formats which has high-compression rate and light file size. The question is, which MP4 video player you should use? Surely you need a good media player to play various videos including MP4. It’s quite essential to have an MP4 player for watching your favorite movies, either on a Windows 10/8/7 PC or a Mac.