All the video demonstrates is that PP does not have the intellectual discipline or desire to understand and seriously engage what Nibley is saying.
Aha! You have had a look then? You seem to be the only pro-mo with the courage to admit to having actually viewed it, and to make some kind of direct comment. Congratulations!
Do you think that Nibley's presentation showed 'intellectual discipline'? As someone who does that kind of thing for a living, the most charitable interpretation I can give of his strange performance is that what we saw was a verbally fluent person faced with a problem he couldn't really handle, even though he admitted it was important. He therefore yielded to the understandable temptation to talk round and round and round the issue without ever coming to grips with it. The uncharitable interpretation is that he was deliberately obfuscating. The effect on the audience would probably the same either way: I think the technical LDS term is 'stupor of thought'.
What I know of Nibley doesn't make me admire him very much, but I was still sorry to see someone labelled as a scholar pull that kind of trick in public. But you thought it was a great lecture, evidently?