The Philips 65PUS8601 has a greater number of video formats than most TVs of this age and spec. This television supports an AVI video formats supported, which is the most frequently supported video formats supported supported by 4K and 8K TVs that came out around the same time as the 65PUS8601. The video formats supporteds "H.264", "MKV", "MPEG1", "MPEG2" and "MPEG4" are also supported by this Philips television.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.