Pretty much the worst
I let my toddler watch YouTube kids and the things I saw her watching were nowhere near educational. Lots of videos using heads characters she’s familiar with just stuck on weird bodies changing colors. She also would get uncharacteristically distraught if I took her iPad while watching YouTube. I sat down with her to watch a video and up popped a picture of a car explosion on a street! The music didn’t change so if I had not been watching, I wouldn’t know she was seeing things like that. Once that popped up I deleted YouTube from her iPad. She’s perfectly content using other apps that I know are educational, or at the very least, appropriate. I would recommend every parent/grandparent deleting this app.
Yamieyones about YouTube Kids, v3.07.12