The TX-55DS500 has a greater number of video formats than most televisions that came out around the same time as it. This Panasonic TV supports an AVI video format, which is the most frequently supported video format supported by large TVs that were launched in the last year. The video formats "3GPP", "M4V", "MKV", "MP4", "PS", "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.