Content creators can choose to disable notifications on specific videos. Creators sometimes do this if they publish more videos than usual, or of the video is

Content creators can choose to disable notifications on specific videos. Creators sometimes do this if they publish more videos than usual, or of the video is different from their normal content. Also when you subscribe you now also have to click the bell next to the subscribe button to get all notifications. YouTube itself also has a built in subscription feed that lists all videos published by channels you subscribe to. It also lists the channels with an icon next to each if they have unwatched video.