Teaching a robot to dance, move or even stand up used to take countless hours of training. Now, by simply recording a video, you can teach a robot a new skill in a fraction of the time, says roboticist David Dobáš. In a live demo with TED guest curator Bilawal Sidhu, Dobáš shows how advances in AI are transforming the way these humanoid machines learn — and proves it with a robot dance performance at the end.