The 48PFT4100/12 has a greater number of video formats than most TVs of this type and age. This TV supports an AVI video formats supported, which is the most commonly supported video formats supported supported by mid-size TVs that came out around the same time as the 48PFT4100/12. The video formats supporteds "H.264", "MKV", "MPEG1", "MPEG2", "MPEG4", "VC-1" and "WMV9" are also supported by this television.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.