His talk sounds intellectual, but he's way off base. Language is what separates humans from the other animals!
He presents a couple of examples and pretends that its scalable. It's not. And I find his examples to be more confusing than illucidating; in fact, much like manipulatives, I question whether his "interactive software" learning translates to actual math learning.
I'd be interested to see how these studies he mentions were set up and evaluated.
The biggest problem, though, is this: why do we teach math in the first place? I assert it's so we have tools with which to solve real world problems. And real world problems are usually presented in words! In my thirty-sixteen years of life I've never had to use pictures to help a penguin get across a computer screen (watch the video above!), but I've had plenty of issues arise wherein I needed to use my math abilities. The point of math instruction isn't to solve a math problem, it's to solve a real problem! Math is just the tool, the language, we use to solve the real problem.