The number of video formats supported by the Philips 40PFT4509 is more than most mid-size TVs that were released around the same time as it. The most frequently supported video format is MPEG, but this video format is not supported by this TV. The video formats 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.