Wild! The YouTube, I mean. I watched it all.
I can't imagine being in such an audience to begin with, so not a problem. But I'm thinking this is not uncommon as a generic form of using children ---- the baby Elvis impersonators? The little 8-year-old revival preachers: that used to be a big thing before about 1960. All those kid actors! And that Greta Thunberg, who is not just a child, I think there is also something wrong with her, impaired. All those St. Jude "kids" used for fundraising, no longer kids anymore but certainly dwarven. And sexual use of children by priests, teachers, scout masters, etc., etc. forever all around the world. This isn't the fault of any of the children, after all. But some parents WILL do it.
It's probably better than some serious physical abuse situations. He may be able to grow out of it. Change his name and fix that lisp and --- move away. Probably will, too.