I agree that most people don’t comment on videos. Audience interaction is normally a small proportion of viewers. That has always been true of any online community (and I’m sure offline). But you don’t have to scroll far to see that there are normal comments being made that are buried beneath the “popular” posts that receive responses because they have said something inflammatory.
Given that this was a central point of Hank’s article, and the reason H&J proposed the “+” system — which worked very well — I don’t see how my point is in contention. The only thing I’m adding to that point is questioning why the action of upvotes and downvotes doesn’t change the comment rankings.