The number of video formats supported by the 55PFT5509 is more than most televisions of a comparable type and age to it. This television supports an AVI video formats supported, which is the most commonly supported video formats supported supported by televisions that have been around for around the same time as the 55PFT5509. 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.