This material is highly prized in art conservation. If you ever watch Baumgartner painting restoration videos on YouTube, he frequently uses this or another similar paper to securely but lightly adhere to a painting's surface while he's working to stabilize it from the the back. May seem like a waste of rare paper but it serves an excellent purpose for that niche but important craft.

More importantly, this video is too short. It doesn't talk about why this paper can last a thousand years other than saying that it has.

Also I think the UK host gets short shrift. I really want to know his story. That on its own would be super interesting.