I wanna watch youtube on my psp but idk how to. I've looked all over the web and found no answers.
Well there's your problem :p Get a mem stick, the smallest ones are like, 5 bucks xD
Unless you can run the YouTube homebrew app, you will have no chance in hell getting it to work using the PSP's web browser. (You need to have a hacked PSP in other words.)
Check my profile for my MSN, i'll help you out installed the CE custom firmware.

Depending on your current version though,

Fender Stratocaster in Red.

It's all I need.

The Anti-Anti-Ibanez Militia!