(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.

Having said that, this device is really just for people who want the convenience of having both a soundbar and a streaming player in one compact package. If that doesn't sound like a cool perk for ...