Grandson (8) been allowed to watch YouTube. Totally against it. Popped in to visit us on way home. I was in kitchen,came in with mum who joined me in kitchen,never said hi but went straight into lounge picked up the remote control found YouTube and was “away”. He can have spectacular “meltdowns” if things don’t go his way. They are coming for Christmas and there is no way he will get the remote. Any suggestions?