Fascinating video. I agree it might be too intense for some people. I'm still watching it. So, far I've only watched the first part.

It's interesting that sleep paralysis/hypnagogic hallucinations have been recorded so far back in history.

I read a book from the library where I work a few years ago. Can't remember the title. I'd like to re-read it now that I have different insights into psychosis because of my son. Anyway this was a book about a murder trial in some eastern state (Rhode Island?) before the United States was formed (1600's?). An old woman had died, and it was believed to be a natural death, until she came to a neighbor in a hypnagogic hallucination and told him that her son had murdered her. This was enough to open an investigation, try the son, and execute him.

The author of the book saw this as a product of the fact that the community knew there was something seriously wrong in the family. The woman had complained bitterly and frequently to her neighbors about the treatment she received from her son. Possibly the community "knew" on some level that the death wasn't an accident, but they had no evidence until the "ghost" came back to tell.