Psp Video Resolutions

[Isaiah7300]

Hey whats up everyone? I have some video's that i'd like to put on my psp. I'm wondering if i should put them in the regular 272x480 psp screen format, or like a dvd 480x720 (or even 408x720 which matches the 17:30 aspect ratio of the psp screen resolution). I know that the dvd ones will be like maybe a bit bigger (size wize), and im curious if its worth it. Any help or suggestions would be appreciated!

Thanks!!!