The number of video formats supported by the Philips 55PFT6550 is more than most large TVs that have been available for around the same time as it. This Philips television supports an AVI video formats supported, which is the most commonly supported video formats supported supported by TVs of a similar age and spec to the 55PFT6550. The video formats supporteds "AVC", "H.264", "MKV", "MPEG1", "MPEG2", "MPEG4", "VC-1" and "WMV9" are also supported by this TV.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.