I've watched the video three times and I have my doubts.

Why is the robot arm a right arm and the one manipulating it a left arm?

Why is nothing above the elbow shown?

I am not saying this is fake, but it wouldn't be hard to fake. A few little zipping noises, some body paint, speed it up slightly, add in some CGI muscles underneath the skin...

Again, I'm not saying it is fake, but it could easily be. Extraordinary claims require extraordinary evidence.