If you login from a new computer or unrecognized IP, Google forces you to use the YouTube app on your phone to enter a “code” to login. It sometimes doesn’t even let you get a text code. God forbid I lose my phone or delete the YouTube app and login from a new IP. I don’t know how I would even get into my account.
I don’t know how this isn’t a wider spread issue affecting more people but I guess Google developers live in a perfect world where the YouTube app auth can never fail and you never lose your phone.