For me there seems to be a proportion of "uhhs" that I require. This talk had a lot of them, more than I'd prefer, but it wasn't horrible and the content makes up for it (as does the Q&A). The extent of the reliance on the transcript was probably the extent people rely on notecards, the "uhhs" were mostly to fill the silence of when he was glancing at it to remind him of his place. If there aren't any "uhhs" at all in a talk I think "this guy took a speaking course and is probably trying to manipulate me", if there are too many I think "this guy didn't prepare or is just a bad public speaker", but there's a right proportion that makes me think "he's sufficiently human so I'll listen to him." Of course that last thought requires a bit of double-think since a good manipulator would know this about me.

Edit: of course, this is more of a description of how my subconscious works. Consciously I try my best to ignore these things and focus on the information content alone and feel like I should downvote you for letting yourself miss interesting content because of the speaker's presentation style. (Though to be fair at least you have the text version for 99% of the content.)