(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.

Earlier it was called Groove Music player for Windows 11 and Windows 10. However, things have changed a lot, and now it is called Music Player. You can play almost any file in this app. No matter ...