hmm... Well, I have a psp, I mainly use it for gaming, but I also got movies for it. Though, i don't watch many movies on it anymore since I got a video ipod. I also use it for the internet, knowing I am going to paneras to eat when I go out shopping... to check up on things
If he is just mainly use it for movies and tv shows, I would suggest an ipod, it has a bigger storage space. On the psp you would have to use an media card, which the biggest is like 2 gigs compared to the largest ipod which is 80 gigs. And movies files aren't small either, each movie is about a gig.
Also, for the ipod there are special connectors, i guess i could say, that could hook up your ipod to the tv and watch movies and such on the tv from your iPod.. I got a speaker last year for christmas/birthday, this speaker does that... I actually used it for when I go to my grandmas or When I play the not study game at college
Edit: I just found this
website... you just need a cable, I didn't try it yet... it's 1 am my ipod is in another room so is the tv, i don't want to wake the family... I will try it in the morning