I cannot fathom the possible rage, shame, and more that teacher was experiencing in that video. Such a horrible, vile attack to be under by one of her own students!!!
And I don't blame you at all for wondering if teaching in a classroom isn't worth it. I've done the same in response to other traumas and concluded it would not be worth it, or healthy for me at all. And I'm done throwing myself under buses for people who see me as less human then they are.