Most scary would be if everything was done without any human intervention.
Which probably is mostly the case, cause when programmed you would use the arm to unlock and hold the door open.
My guess is the only human input here is to the first dog to go through the door by asking the other dog for help.
Otherwise, if everything was preprogrammed, this would hardly be a special video.
They should make a horse sized version, so people can sit on it.