So my most popular video, "Double Your Internet Speed for Free" usually get's the most views out of all my videos, but I've had ratings disabled on it basically forever. This is because it's historically gotten a lot of negative comments, so I figured it would ultimately get a ton of dislikes. A few days ago, I decided to enable ratings just to see what would happen. These are the results; I think they speak for themselves. As soon as I enabled ratings, the daily views basically tripled. Obviously this means that either having ratings enabled, or getting ratings at all significantly affect ranking for suggested videos, since that's where most of these come from.