Oh. My. God. That was beautiful.
I'll have to watch this again later to see if I can get some more, but, like MolGen... I tend to understand German a bit better when it isn't being shrieked...
Anyway, The beginning seemed to be mostly full of exclamations of "Was?" "Anmachen!" "Starte" and "Ich will ____ spielen!" (What!? Go! Start! I want to play _____.) (no idea what he said he wants to play...)
After a bit of shrieking and repeating all of that... a few deep breaths, then "Ich sag's dir noch einmal. Los!" (I'll say it to you one more time. Go/Begin!)
Then some more unintelligible shrieking... then "Ach! Was ist das denn? Oh, mein Gott, was ist das _____." (Ach! What is this? Oh, my god... what is this (something... need to listen again). "Ich will spielen! Schnell! Start!" (I want to play. Quickly! Start!)
Then he gets into a chanting, singing "Jetzt geht's los! Jetzt's geht's los!" (Now it's starting / now it's beginning - the verb losgehen - meaning to begin, is often used in this context... jetzt geht es los. Kind of like "here we go" or "game on!")
He then yelled "Spielen, spielen" (play, play) a couple times before bunch more unintelligible howling.
The "positive thinking, einfach (simply) positive thinking" thing cracked me up... then... an extended rant, the only word of which I caught was "Scheisse!" After that was the rant about the escape key... "Der escape Knopf... der Escape Knopf... wo ist er? wo ist er?" (The escape key... where is it?)
Didn't get much out of him talking to the voices in his head, either, other than one of the lines I found funniest, "Ich brauche keine Hilfe." (I don't need any help.) Pretty much degenerated completely after that. I'll watch it again later to see if I can get more. I'm sure the best stuff will be the shriekiest, so will be most difficult to understand.