You can disable these notifications. Just tap the menu button > Settings > Notifications and uncheck 'Recommended videos'. Hope this helps.
@TeamYouTube why am I getting notifications for channels that I’m not subscribed to?pic.twitter.com/vILSVM2P8Y
-
-
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.