Hahaha, I love this video! In this clip, even is used to emphasize his statement. He is telling the students that they better not try to play any tricks on him or to mess with him. Even in this context is typically used to emphasize anger, seriousness, or surprise.
Ex: Don't even think about it.
Ex: He has never even heard of Jennifer Aniston!
Ex: You don't even have a chance of winning the lottery.