The number of video formats supported by the TX-55CS620 is more than most large TVs that came out more than a year ago. This Panasonic TV supports an AVI video format, which is the most commonly supported video format supported by similar spec TVs that have been available for more than a year. The video formats "3GPP", "FLV", "M4V", "MKV", "MP4", "TS", "VOB", "VRO" 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.