I watched one PragerU YouTube video, just to see what all of the fuss was about. I have no idea if this is typical of most of their videos, but the one I watched was like this:

It features a group of teenagers, and one video covered one topic. The topic they covered was a controversial one where there is no clear right or wrong answer, but conservatives typically lean one way, while normal people lean the other way. I don't think it was about gun control, but I'll make it about gun control as an example.

Group of kids talking: "Did you hear about the school shooting?" "Yeah. My parents think the government should have stricter gun control." "Oh, my parents think the problem is that there's not enough security at the schools. But could guns themselves really be the problem?"

Scene changes to girl, talking authoritatively directly to camera: "No. Guns are not the problem. No school with metal detectors and armed guards has ever had a school shooting."

(I just made up whatever sounded like something that they'd say. I assume the fact I made up is wrong.)

And then, it's just like that, over and over. Kids bring up complicated issues, and some other kid just tells them the "right" answer, every time, giving the flimsiest explanation as if it's the gospel truth.

I would characterize showing these videos to actual children as a form of child abuse. Poisoning their minds and inhibiting children's ability to think for themselves.