Agree. The video is BS.
What are you saying? The teacher is in on it? They are doing performance art?
I'm afraid to tell you, it isn't. I have been through similar stuff as a teacher, and students always whip out their cell phones to record this stuff. I suppose they think they are recording the teacher's helplessness and being the target of such disrespect. In reality, the thug morons are merely providing the police with evidence against themselves.