Obv co parenting is new to both of us,,but i would have though that things like that would he discussed. There are plenty of things that kids love doing. Like spending all day playing minecraft or eating a load of sweets. Arent we as parents there to guide them?
Absolutely, so it sounds as though if your H had just run it past you, this wouldn't be an issue. Maybe you could just address it like "hey no big deal, but things like the youtube channel can you just run past me first in future". I'm no co-parent expert either but this is probably how I'd address something that has irritated me.
Me: 41 W:42 T: 14 M: 11 S: 6
"What happened happened, and couldn't have happened any other way...because it didn't"