I'm having this debate with myself at the moment. I've just deregistered ds1 from school to home educate him, and he has spent four hours this afternoon watching stampy cat minecraft videos on YouTube.
I don't want to make screens a forbidden pleasure, but I also don't want him to get so sucked in that he forgets how to play and learn on his own. I have no particular problem with stampy cat, the boy is a genius and all that, very responsible and educational, but I do worry that ds1 will never learn to self regulate. Maybe I need to give it more time. ..
I banned screens yesterday, just as an experiment, and the boys really played together, which was lovely. I found that, as a single parent, I found it hard not to be able to use the screen as a babysitter while I showered and cooked and all that.
Not sure this is comparable, but when ds1 was about three, he was always asking for sweets, and I tried to restrict his access to them. One day, I gave up, handed him a whole family bag of haribo, and said he could eat as much as he wanted. He ate loads, felt sick, and hasn't touched the stuff since.
Still, screens are weirdly addictive. .. It's such a difficult decision, isn't it?