File Extension .MP4
.mp4 files are movie files that can typically be played using a wide variety of different media players, although it may be necessary to down load the appropriate Codecs from the media player website. Windows Media Player, as well as various other freely available media players can be used for mpeg-4 playback. If you are having problems opening a MP4 file simply click the green button below to completely repair file extension .MP4 associations in the Windows Registry - Then OPEN your File!