Cannot access Youtube without signing in

Starting the evening of March 12, 2026, I am unable to access Youtube on a laptop or mobile device unless I sign in to Youtube.  I receive this message "Sign in to confirm you’re not a bot".  This occurs only when I'm using Xfinity internet service; I have tested using AT&T and also Fidium, and do not have any problems.  I can only conclude that my Xfinity IP address is now on a blacklist.  I do not want to create an account to sign in to Youtube.  Why is Xfinity service an issue?