I've seen that before and also something about scientists removing a monkey's brain and transplanting it into a different monkey and having it work or something..
Honestly, it disturbs me. If it's not natural then it really shouldn't be done. I personally don't like this kind of science. I'm fine with like, life support machines and medical equipment that help cure illnesses and keep people living even if it's technically not natural, but it's not really far into "playing god" like some scientists do with cloning and such. Cloning and weird science like in that video scares me. I do hope it's a fake, but who knows?
I understand doing expiraments and things to test medical procedures or find cures, but if it has to go as far as to become kinda disturbing like this.. I just think it should be avoided. I like things remaining like.. natural. Just my opinion. Bringing dead things back to life, or keeping an animal's head alive just for research doesn't mean the subject being tested on is happy or not suffering. It's just crazy thinking of the things scientists can do, but some things should just stay in video games and movies and books(they're not scary that way!) c: