Public shaming is essential. Anyway it still happens, even more brutally, in the comments.

What they should have done is add more detail on the nature of the downvotes, like the Steam store does for negative reviews. That is, have graphs of positive and negative ratings over time to make any downvote brigading obvious. Maybe have a way to exclude "less-verified" votes, or allow the viewer to look at only e.g. YouTube Premium votes (which are more likely to be real people given the cost). And so on...