This is an amusing video. The cats are using the guy in the kitchen, who is busy preparing lunch, as a cat tree oblivious to the fact that they are climbing over a human. Cats do climb onto people’s backs and clamp on with their claws. Pure agony. It is usually young cats who do this, climbing all the way up the legs onto the back leaving nice puncture wounds all the way. They learn that it is unacceptable. I hope they are taught gently.