The number of video formats supported by the 55PFT6550 is more than most TVs that are a comparable age to it. The most commonly supported video format is AVI, but this video format is not supported by this TV. The video formats AVC|AVI|H.264|MKV|MPEG1|MPEG2|MPEG4|VC-1|WMV9 are also supported by this Philips TV.
AVI stands for Audio Video Interleave.
WMV stands for Windows Media Video.