Video format in PSP

May I know PSP reads what video format? It doesnt seem to read MP4 and AVI.

psp is in mp4

can use both mpeg4 and avc as video codec. aac-lc as audio codec

...as for looking for a video converter for psp, use google search

Use Plato Video PSP Converter.

But I downloaded a video in MP4 format, cant seem to read it. I copy the file to the Video folder.

coz the psp can only read main profile avc with some other limitations.

Huh? I dont get you.