Things You'll Need
Instructions
Connect your PSP to the PS3 with the PSP's USB cable. The small end of the USB cable will connect to your PSP and the large end will insert into your PS3.
Turn on your PSP and go to the "Settings" tab to put it into USB mode. Select "USB Connection."
Go to the "Video" tab on your PS3. You will find your PSP listed as a storage device.
Highlight the movie that you wish to copy and press "Triangle" on the controller.
Select "Copy," then select your PSP as the device to which you wish to copy the file.