The TX-58AX802 has a greater number of video formats than most TVs that have been around for around the same time as it. This Panasonic television supports an AVI video format, which is the most frequently supported video format supported by TVs of a similar age and spec to the TX-58AX802. The video formats "3GP", "AVCHD", "FLV", "M4V", "MKV", "TS", "VOB" and "WMV" are also supported by this TV.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.