The 40PFT6550 has a greater number of video formats than most TVs of a similar age and type to it. This TV supports an AVI video formats supported, which is the most frequently supported video formats supported supported by mid-size TVs that have been around for more than a year. The video formats supporteds "AVC", "H.264", "MKV", "MPEG1", "MPEG2", "MPEG4", "VC-1" and "WMV9" are also supported by this Philips TV.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.