Hiding Dislikes Changed What a Like Count Means
Creators still see dislikes in YouTube Studio, and the system still uses them. What disappeared was the public number, and with it the ability of any viewer to judge a video by the balance between the two.
The consequence is that the like count became load-bearing. It is now the only piece of crowd feedback visible on the watch page, and viewers evaluate videos with it whether or not they think about doing so. A tutorial with 60 likes and a tutorial with 6,000 read as different levels of vouched-for before anyone presses play.
This is the honest case for buying YouTube likes, and it is a different case from the one made for Instagram or TikTok. It is less about the ranking system and more about the judgement a human makes in the two seconds before deciding whether your video is worth their next ten minutes.