(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.

Windows Media Player is still one of the best tools for playing music and movies ... one that affects media files such as .3gp, .3g2, .mp4, .mov, and.adts. You see, whenever any of these media ...