The 55PUS6561 has a greater number of video formats than most new 4K and 8K TVs. The most frequently supported video format is H.265, but this video format is not supported by this TV. The video formats AVI, H.264, MKV, MPEG1, MPEG2, MPEG4, VC-1 and WMV9 are also supported by this television.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.