The number of video formats supported by the TX-40DS503 is more than most new similar spec televisions. This television supports an AVI video formats supported, which is the most commonly supported video formats supported supported by mid-size TVs that have been on the market for around the same time as the TX-40DS503. The video formats supporteds "3GPP", "FLV", "M4V", "MKV", "MP4", "PS", "TS", "VOB", "VRO" and "WMV" are also supported by this Panasonic TV.
MP4 stands for Moving Pictures Expert Group 4.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.