I am making a direct to ps3 video download site and i am having trouble getting the

I am making a direct to ps3 video download site and i am having trouble getting the videos to download to the right spot on the ps3, it will only let you download it to a flash disk or soemthing, if you have nothing plugged in you cant download it, anybody tell me why this is? what can i do to make the videos go to the video section on the ps3?

Make sure they are the correct format. (Mp4 or m4v)
I think 3gp is also supported.

they are the corrct format, i used ps3 video 9 to convert them, and i have them on my ps3 now and they work, but thye just wont download to the right place, if i cant fix this my site is ruined
(btw 3gp is not supported)