I noticed this yesterday and now I am wondering what to do. Especially when more and more videos are getting flagged. ID is out of the question, credit card seems more plausible. However, i wonder what happens when you give the number. I don't want that it sticks after validation...
>Important: If you enter your credit card info for age verification, Google will retain this data as necessary to meet legal and regulatory requirements.
Must be because of audit laws relating to processing credit cards.
https://support.google.com/accounts/answer/10071085?p=age-ve...