For the most part you are talking about dislocating joints as opposed to breaking the bones. This kind of video is irresponsible IMHO. In a class when teaching this kind of technique a teacher has often already assessed the students before getting to this stage and therefore avoid teaching a budding psychopath things to add to their arsenal of hate. You might think you are showing how great, tough and serious you are but actually you are just giving away information to anyone that has access to a computer and the internet. Dangerous techniques etc need to be properly curated to protect the innocent and the foolish at the very least.