She explained that some activities (active ones, social ones, etc), once you are used to planning them and doing them, actually reward the brain a lot more than scrolling, and eventually you don't go back to the addictive behavior anymore. It's a form of CBT. I'm going to try it because I have nothing more than her word for it.
That's also the issue, isn't it? YouTube addiction feeds in the vacuum of not knowing what other activities one wants to do.
Doing nothing and don't know what you want to do? Maybe you open YouTube to fill the void. I know I do (even though much less nowadays).