She's presenting on research that shows that neural patterns in listeners mirror those in speakers. Thus, she argues, it seems that a key to communication is the act of transmitting internal brain states — or, at least, evoking in a listener the same brain state as a speaker.
This all seems pretty sound to me — it's an idea has been very well fleshed out in linguistic theory at least since the semiotics of the mid-twentieth century. This more recent research seems just to provide a neural basis and confirmation for a phenomenon that we've already come to understand well through philosophy.
It's only implicit in this talk, but it strikes me again how often neurological and psychological research is presented with the headline "we now know that..." when the conclusion is something that's already been known through the humanities or common sense for a very long time.