The number of video formats supported by the 55PFS6609 is more than most large TVs that are a similar age to it. This TV supports an AVI video formats supported, which is the most frequently supported video formats supported supported by similar spec televisions that have been available for around the same time as the 55PFS6609. The video formats supporteds "AVC", "H.264", "MKV", "MPEG1", "MPEG4" and "WMV9" are also supported by this television.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.