Youtube playlists no longer run automatically?

In the past you could set the videos in your Yotuber playlist so that whenever a new video was uploaded it would appear in the playlist automatically. So you could enter MINECRAFT, for example, and the videos that have MINECRAFT as the title are automatically added to the Minecraft playlist.

But now that is no longer there, why? Do I have to manually add the videos to the playlist every time?

You have to activate autoplay at the bottom of the video

I meant my own uploaded videos.