Youtube has been testing removing public display of dislikes videos have gotten. You could still dislike, but u wouldn't know if majority disliked the video or liked it. They have said that this is for the well-being of the creators and it could work towards ending "dislike campaigns". However people have criticized it cause like-dislike ratio has also become indicator if the video's information is legit or if the video is scam or if it's just bad quality. I agree with the criticism cause I use dislike bar for that too- if the video has mostly dislikes I know it wasn't what I was looking for. If it was guide I know it wasn't good one, if it was upload of music video, ep, anything like that I know that it's just fake video trying to collect clicks and so on. Also dislikes were good way to battle against clickbaits- if video has nth to do with title and thumbnail plp usually dislike it.