Yes I have a couple sources. I hate to link a YT video, so I’ll use invidious. Both are great informative videos, but I don’t want to take up your time.

However, check this link first because it might be speculation without hard evidence, while other evidence points to them doing this exact thing but for adults or people 13+ news.ycombinator.com/item?id=20167085

Its at the very end at 10 minutes redirect.invidious.io/watch?v=Yv2Eb_kJous

Also here at 12:25 mark on the video redirect.invidious.io/watch?v=9wknq-Ra-KU