The KDL-50W829 has a greater number of video formats than most comparable spec TVs that were released around the same time as it. The most commonly supported video format is VP8, but this video format is not supported by this television. The video formats ASF, AVI, MKV, MOV, MP4, MPEG1, MPEG2 and WEBM are also supported by this Sony TV.
AVI stands for Audio Video Interleave.
MP4 stands for Moving Pictures Expert Group 4.