This was a college lecture, and taping them isn't usually done.
I believe that some lectureres don 't want their lectures taped so as to protect them against piracy.
And I believe that many venues don't allow taping, or even still photography.
Well, like I said, I believe he--but you'd think there could have been one picture phone in the audience--somebody with one of those cameras which also do the little movies. Some Muslim bully snarling at a pretty gal like Gabriel--it would have been priceless.