A lot of this I can relate to. School was hell for me, and I still struggle to forgive the adults around me during that period who, despite knowing what I (and others) faced, failed us utterly. Of course, school is rough and tumble - but when things went too far they sympathised, and in some rare cases talked to the bullies parents. I don't ever remember anyone being excluded or punished properly, though.
One thing I am never, ever, going to tell my kids is the stupid "sticks and stones" rhyme. That's just to make you feel better, not them. I'd get depressed, or upset, and get hugs and sympathy, but no solutions.
The first guy he describes in this video I can relate to. I became withdrawn, anti-social, believing that solace was in books and learning rather than other people. Fortunately I ran into some people at university who slowly dragged me out of myself. And, eventually, I met a girl who tore apart my world and helped me rebuild it (although, maybe she didn't realise at the time, I'd got so good at hiding everything away).
One particular idiot at school loved to taunt me, hold my upside down by my ankles. One day I snapped, and as he ran at me I picked up a chair and swung it. So. Much. Trouble. I was very nearly expelled... The same guy was a consummate bully, big, loud and evil to anyone weaker than him. There was another kid in our class, a bit large but it was more muscle than fat. He was lovely, quiet and very very odd (I think he came from a bad family). One day the bully was shaking down some younger kids in the playground and, I remember this vividly, this guy just decided enough was enough. He calmly walked across the playground and threw bully against the wall. Pounded him in the face a few times and told him to stop. It worked, so so well (he was excluded of course, but there you go...), and we rarely suffered again.
What does this teach kids? That there is no justice in the world except that which you take by violence?
I am certain that school ripped up several years of my life, and still adversely affects me to this day. But what can we do? Kids will be kids, eh?