i don't think the YT description is a bit, I think it's a lie. Obviously youtube wasn't around until 2005 so it couldn't have been "kept on private" like the guy said, but maybe that's just boomer brain of not knowing how the internet works. But all the military/airline connections in his career are very sus. I don't think the video is a deepfake, and I do think it's genuinely never-before-seen footage. I can't speculate what his motivations are for releasing it, but the 'i kept it private' excuse is definitely not true, at the very least. Maybe he feels guilty for something he was involved in and is leaving a trail of breadcrumbs for people to follow now that he's old.

EDIT: If you mean the Harry Potter stuff, and him connecting it to a passage from Corinthians, make of that what you will. I don't think that part was a bit, I think the old man who posted the video genuinely found solace in a passage from a kid's book, as weird as it might seem to us.