(1) A handheld device that plays video in the MPEG-4 movie file format. See MP4 and portable video player. (2) Any media player software or Blu-ray/DVD player that supports the MP4 movie file format.

Some Windows 11/10 users using Windows Media Player, Xbox music, or Media Player app have reported having encountered error code 0xc00d36c4 when playing media files ...

or make it compatible with your media player. For instance, converting those YouTube clips from MP4 to MP3 reduced their sizes by about half (600MB vs. 300MB in the case of one file – much ...