The 55PFS7509 has a greater number of video formats than most large TVs that have been around for around the same time as it. This television supports an AVI video format, which is the most commonly supported video format supported by TVs of a comparable type and age to the 55PFS7509. The video formats "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.