If you are unable to open an MP4 file on our media player, try changing the video format. There are many good video converters available on the internet that can help you convert your MP4 to MP3, AVI, ...

MOV is not one file format but rather a format envelope that can be made up of any of dozens of codecs, resolutions, and frame rates from basic DV through H.264, HEVC to ProRes, and other pro formats.

Scenario: You’ve obtained an audio or video file that’s either in a format unsupported by the device you intend to play it on—an iOS device, traditional iPod, or your Mac, for example—or in a form ...