It's just clickbait like most of his videos, I never really liked Chriss' videos, the tip of the iceberg was when he told people to disable kernel mitigation for a presumable performance boost (I tested it with disconnected network, it was like 2% on my machine), which is just plain dumb.
Use whatever distro you like, just know that you don't have to distrohop for some program (DE or WM or whatever). I personally use endeavour, simply because I've used arch (and derivatives) for a while now and endeavour is just arch with sensible defaults and a lot of the configuration one would do anyway already done.
A friend of mine got his son to use Linux by just not providing an alternative, he installed Debian edu (don't know if that's the name, but basically a Debian spin for kids with parental restrictions and stuff) on an old laptop for him and that's what he used. Once he got his own PC it was over though since he wanted to play Fortnite so bad that he bought windows for that. He still dual boots Fedora, but I don't think he has used it since the windows partition is there.
I think the thing is you can't really get kids (or people in general for that matter) into Linux the way you are probably into it and interested in it. At least not if they're not already interested in it on their own. They will learn how to use it sure, but not the way we're used to using Linux, understanding the intricacies of the system, keeping the system safe,... They'll probably find a way to do what they already do on windows and ignore that the OS is different.