The number of video formats supported by the Philips 55PFK6550 is more than most TVs of this spec and age. This TV supports an AVI video format, which is the most commonly supported video format supported by TVs that came out more than a year ago. The video formats "AVC", "H.264", "MKV", "MPEG1", "MPEG2", "MPEG4", "VC-1" and "WMV9" are also supported by this Philips TV.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.