The U40S6806 has a greater number of video formats than most 4K and 8K TVs that came out in the last year. This TCL-Digital television supports an MKV video formats supported, which is the most commonly supported video formats supported supported by similar spec TVs that have been on the market for around the same time as the U40S6806. The video formats supporteds "AVI", "MP4", "TS" 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.