The comments start at approximately 27:00 and the video is available here.
"There is a field called Evolution of language, which has a burgeoning literature, most of which in my view is total nonsense. But anyway, its growing. In fact, it isn't even about evolution of language, its almost entirely speculations about evolution of communication which is a different topic. And its kind of natural topic to look at if your caught up in another myth, a misinterpretation of evolutionary theory, which holds that changes take place only incrementally. Small change, then another small change, and finally you get complex organisms. That was believed at one time, and you can find sentences in darwin... you can quote, thats the bible. But for a long time evolutionary biologists have understood it doesn't work like that. You can have quite sudden changes that, small changes, that lead to huge phenomenal difference. In the area of communication you can mislead yourself into believing that since every organism you can think of, from bacteria to humans, has some kind of communication system, so maybe our communication system us just a slight modification of primates' or whatever you like. But its undoubtedly not true, but at least you can delude yourself into believing it. On the other hand language seems totally separate. These nothing even remotely analogous or nothing at all homologous as far as anyone knows. Theres a few things that look similar, like say songbirds are at such a distance from an evolutionary point of view that its just got to be convergent evolution to the extent that there is a similarity. And there is interesting questions you can study, but only if you take biology in the last 50 years seriously.
If you are back to the pop darwinism that you learned in 8th grade thats no good. Anyhow, the fact that theres been no evolution in 5000 years is interesting if anyone really wants to study evolution of language. It raises a lot of questions, but I don't want to get to far from the Poverty of the Stimulus...