I'm sure it felt real to him.

It always does.

Freaking dreams feel real to us, and we tend to fly in those and such.

My mother experienced the same thing when she couldn't wake up from the anesthesia after an operation.

But neither of them at any point were dead, and like I said,

you can replicate those effects with what the brain likes the most,

drugs and electromagnetic fields.

I have not watch the whole video, it's too long for a busy man.

Especially, as the topic is not something I would be super interested in,

Pretty much sure it don't mention anything I wouldn't already hear about. :P