For informational purposes only.
Whoever is signed in and has supplied their age, they don't see this safety message:
"Potentially inappropriate video
To view this video, please confirm you are old enough by entering your birth date.
Notice Age-restricted video (based on Community Guidelines)"
You can use these sites to get around Youtube age restrictions:
invidious.snopyta.org
invidiou.site
vid.mint.lgbt
invidious.ggc-project.de
yewtu.be
invidious.xyz
invidious.tube
invidious.site
http://www.nsfwyoutube.com