The number of video formats supported by the 43LX540 is more than most televisions that have been around for a similar time to it. The most commonly supported video format is AVI, but this video format is not supported by this television. The video formats 3GP|ASF|AVI|DIVX|M2TS|M4V|MKV|MOV|MP4|MPEG|MPG|MTS|TRP|TS|VOB are also supported by this TV.
MP4 stands for Moving Pictures Expert Group 4.
AVI stands for Audio Video Interleave.