The LE40U5000 has a greater number of video formats than most televisions of this age and spec. This TV supports an AVI video format, which is the most frequently supported video format supported by televisions that came out around the same time as the LE40U5000. The video formats "H.265", "MKV" and "MP4" are also supported by this Haier TV.
MP4 stands for Moving Pictures Expert Group 4.
AVI stands for Audio Video Interleave.