The number of video formats supported by the TX-42A400 is more than most TVs of a similar type and age to it. This Panasonic TV supports an MKV video formats supported, which is the most frequently supported video formats supported supported by comparable spec televisions that have been available for a similar time to the TX-42A400. The video formats supporteds "3GPP", "AVI", "FLV", "M4V", "MP4", "TS", "VOB" and "WMV" are also supported by this television.
MP4 stands for Moving Pictures Expert Group 4.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.