The 55PFS6909 has a greater number of video formats than most large TVs that have been around for around the same time as it. This Philips TV supports an AVI video formats supported, which is the most commonly supported video formats supported supported by televisions that came out more than two years ago. 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.