Maybe the programming was 2 months or maybe one. The robot itself was build with like two programmed movements and decides when to use ( it depends on the sensors). And it only looks so ,,natural because there is a clever mechanism inside that makes various movements out of 2 programmed motor movements 🤷♂️. But you’re right the bot itself isn’t that cheaply made ( maybe a half or one Year to develop the robot)
I saw an animatronic baby doll in the FB marketplace. I don't know how that would work out for your channel, it would be weird to remove the "skin" from a baby doll and show it off. lol