I watched the video and am highly skeptical of that the leaders of the Watchtower practice any such thing.
At best, if the story in the video is true, it just sounds like a maverick Bethelite with very out there beliefs. I don’t undertand why as a gung-ho Bethelite, he didn’t immediately get up and run when he talked about spiritism and report him to the Bethel elders. That is what a mentally-in JW is indoctrinated to do.
All the other links is based on supposition upon supposition. There are far too facts to draw a conclusion.
I watched the second video as well on the subject and was hoping that he would clarify matters, as I was trying to keep an open mind. Or that perhaps he would produce the mysterious notebook. But he says he’s only going to talk about it for people who call or text him.
I agree with a previous post. Why would any gung-ho JW keep something that was supposed to be connected with spiritism? It doesn’t seem to add up.