The number of video formats supported by the Philips 40PFK5500/12 is more than most TVs of a similar type and age to it. This television supports an AVI video formats supported, which is the most frequently supported video formats supported supported by comparable spec televisions that are a similar age to the 40PFK5500/12. The video formats supporteds "AVC", "H.264", "MKV", "MPEG4", "VC-1" and "WMV9" are also supported by this TV.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.