Dd only had kids YouTube but even with the approved channels I allowed her to watch for an hour max a day her behaviour has been so so so much better since I completely banned it.
It was rough for the first few days where she was having meltdowns about it. I just repeated sorry darling, but no YouTube. And it’s been 2 months now and she only speaks about it wistfully - “oh mum remember when you used to let me watch YouTube?”
Honestly if you’re on the fence it’s so so so worth it!! Dd has prime, Netflix and Disney plus and honestly whilst she’s in the house YouTube will never go back on. Best thing I’ve ever done.