Hi all Before all , i'm sorry for my english i'm french . I found this great forum after searching "macbook air " in google . I need a computer for internet , music and video like youtube etc ... . And 720p video (movietrailer .. gametrailer ) etc .. . Can i do that on an macbook air ? (9400m , 1,86 ghz dual core ) . One more time sorry for my english and thanks for you answers .