The number of video formats supported by the TX-39AS600 is more than most televisions of this type and age. This television supports an MKV video formats supported, which is the most commonly supported video formats supported supported by comparable spec TVs that have been around for a similar time to the TX-39AS600. The video formats supporteds "AVI", "FLV", "M4V", "MP4", "TS", "VOB" and "WMV" are also supported by this TV.
MP4 stands for Moving Pictures Expert Group 4.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.