Crap I’m soo sick of trying to put videos on to my psp will some ONE HELP ME…

Ok ok I dont need a nother converter or a way to convert I have a perfectly good converter ok I just need to know HOW TO but videos on my psp ok I convert it Exactly to the MP4 format then i tried going to MP_Root—->100MNV01 I put my video files there I go into my psp it says EXACTLY “There are no videos. You can import content from a PS3 system or a PC. Details refer to the instructions for the PSP system .” ok After this I tried to to make a VIDEO file in PSP file Again it said the same thing WHAT AM I DOING WRONG??? My psp is a version 4.05 I turned on WMA and the Flash PLayer is that enough??? Its file is MP4 RIGHt??? ThEN WHAT am i doing wrong I convert the videos from youtube wtf am i doing wrong I use Tube tilla like i said dont need new converter or a free online converter like vixy.net still says the quote above what do i do wrong please help maybe u could convert the file and if it works 4 u then tell me EXACTLY how you did it