I only got to the 1:39 mark when I realized where that video was going to go. He's going to accuse the psychiatric profession of having determined these maladies mental illnesses so that pharmaceutical companies could make bookoo bucks. There might be a point that mental illness has been over diagnosed. For example, regular depression that almost everyone has gone through because of a major crisis in their lives versus major depression which afflicts persons throughout their lives even if they have no personal crisis.
I have known schizophrenic persons and I know that there is something imbalanced in their minds; that is their brains. I have known bipolar persons who hallucinate and hear voices in their head.
Just because the pharmaceutical companies are making a killing doesn't mean that the concept of mental illness is wrong.