The video focuses on the "most evil" cults, and I don't argue the existence of such organizations. But more commonly I encounter another kind of cult, the kind that overtly promotes peace and "happiness", but covertly are using highly advanced psychological manipulation to ensure rabid loyalty and large monetary donations. I've been a member of one group like that, and I watch in dismay as some of my friends are loyal members of another of those groups. By focussing on the most extreme examples of cults, I think it is easy for brainwashing groups to go unrecognized for what they are.
[Note: not wanting to be "guilty by association", I don't know anything about the interjected topic of Tibetan groups, and my comments are not related to that.]