https://en.wikipedia.org/wiki/Elsagate
https://www.youtube.com/watch?v=v9EKV2nSU8w
https://www.wired.co.uk/article/youtube-for-kids-videos-prob...
2018 you say? surely they've fixed things by now?
nope
https://boingboing.net/2019/06/03/youtube-sexualizes-childre...
etc.
and that's why none of my kids' devices have youtube on them anymore