Experimentally confirming things you think are true is still science, especially if you can quantify the results precisely. And as he says 1 minute in, this experiment was first done 30-odd years ago, when scientists (perhaps obtusely) did not think babies interacted in a socially meaningful way.
I understand that. I can see how this piece of experimentation would fit into a greater project. But to produce this video and tell the world about it? Seems crazy to me.
