Msn Addy Swapping Psp Help!! Does Anyone Know What Format Vids Have To Be To Play?

Psp help!! does anyone know what format vids have to be to play? - msn addy swapping

Anybody want to negotiate Addy msn and help me a little vids on a memory card for my PC? I have no idea what I do ... Oh, and music! Great music!
Please help!