In theory it should be mostly fine to touch, idk much about it either unfortunately. it might be a good idea to put some sort of spray on sealer if you will be touching it regularly and are concerned about it at all.
It is definitely dangerous to sand or cut with a saw or something, definitely want to do that outside with gloves and a respirator because then you’re getting loose fibers both on you and airborne.
Gotta say, it was quite a good video. I think I watched either most of all of it over the course of a few days to a week a while ago.