The 50PFH4109 has a greater number of video formats than most TVs of this spec and age. The most frequently supported video format is MPEG1, but this video format is not supported by this television. The video formats AVC|AVI|MKV|MPEG1|MPEG2|MPEG4|VC-1|WMV9 are also supported by this Philips television.
AVI stands for Audio Video Interleave.
WMV stands for Windows Media Video.