Here it is: Gerhard Reinke's Wanderlust.
Part one:
P.U.B.E. shows up at 6:40 in this first part. The scene is not as I remember, but it's still f-ing funny.
GR: "Ze pyoob!"
Soldier: (hits him with rifle butt) "Poo-beh!"
GR: "Ze poo-beh!"
And: "But zey von't succeed, due to the heroic vision of ze pyoob!"
*whack* "Poo-beh!"
...the rest of the episode is linked via the video. Don't be drinking or eating anything when you watch it.