The number of video formats supported by the 55PFS6909 is more than most TVs that came out more than a year ago. The most commonly supported video format is AVI, but this video format is not supported by this television. The video formats AVC|AVI|H.264|MKV|MPEG1|MPEG2|MPEG4|VC-1|WMV9 are also supported by this TV.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.