The TX-42AS520 has a greater number of video formats than most comparable spec TVs that were released more than a year ago. The most commonly supported video format is RMVB, but this video format is not supported by this TV. The video formats 3GP, AVI, FLV, M4V, MKV, MP4, TS, VOB and WMV are also supported by this television.
AVI stands for Audio Video Interleave.
MP4 stands for Moving Pictures Expert Group 4.
WMV stands for Windows Media Video.