[mansion7]

You can't turn them off, at least from the app.

It sucks being spammed with things you'll never watch, and for me at least YouTube now three such boxes take up space: shorts, "mixes", and music videos.

They used to have an option to remove these items. Now the option is gone.

[anticrymactic]

If your on Android, then look into revanced. A modded YT app on which you can remove everything you don't like