The NVR-7509-16HD has a greater number of video formats than most televisions of a comparable spec and age to it. The most commonly supported video format is MPEG4, but this video format is not supported by this TV. The video formats AVI, DAT, MOV, MP4, MPEG2, MPG, TS and VOB are also supported by this Nevir TV.
MP4 stands for Moving Pictures Expert Group 4.
AVI stands for Audio Video Interleave.