Ask if he has an oculus rift. Pewdie's gotta have one, right? Tell him that he needs to be wearing it to fully comprehend your advice, then, while he can't see you, knock him out so he can't fight back, kill him, and eat him. A meal that famous should stave off Boots' kobold-vampire hunger for a pretty long time.
ETA: if Boots only wants to knock him out, not kill him, before eating him, that's cool, too. I won't judge how other people choose to eat internet stars.