When I saw the news about the changes and how ridiculously harsh they are, my first thought was, "I'd be amazed if Disney + and Netflix, or traditional TV channels didn't make a big push for this behind the scenes."
Because of course, subscription services like theirs want... well, subs! And their main competitor is Youtube, which in a huge number of non English speaking countries is the number 1 video platform by a wide margin, and in English speaking ones is just behind Netflix. How do you defeat Youtube? Make it impossible for creators, or even the platform to profit from children's content there, since Youtube relies on ads, so creators stop making content for that platform, so parents sub to Netflix or go back to oldskool TV.
What I predict will happen is Youtube will start pushing their subscription service more, and commissioning content for their children's platform or striking deals with channels like Cartoon Network etc. Basically adult Youtube will stay more or less the same, but with something more like Netflix attached to it for kids.