That was excellent - as one of the girls in the video said, it's just so hard to explain cueing to people (and not just the reasons for cueing, as she was saying, but also the mechanics of it). I have a whole list of people I'm gonna pass this on to.
But FFS, why did Corbett not cue when he was doing those demos? The parents, too - there were some who were extolling the virtues of cueing but not using it in their interviews. That's a bit more understandable, but the father of cued speech should've cued his lectures! [end minor nitpick]