I agree: too darn fast. The captioning was inaccurate, too, though it generally is on YouTube. You'd think Google would be better at converting speech to text, but in the meantime they ought to hire one of the companies that do it for TV.
He also interjected too many "funny" quips that detracted from the scholarship of the talk. Stick to the facts, and don't add your own ideas, especially if they fail at being humorous.
Overall, a good story about the numerals, but the delivery lacked professionalism.