@YouTube why are the majority of the videos I’m trying to watch restricted and why do I need a Google Apps account to view them? It’s never been like that in the past.
Sometimes content doesn't violate our policies, but may not be appropriate for all audiences. In this case, you will be asked to sign in to confirm your identity. More info on restricted mode: https://yt.be/help/xC1z . And more on age-restricted content: https://yt.be/help/ai8g .