I don't know what's up, but for some reason I can't get on my second account on youtube with google chrome. I just tried to, and it says that it's unable, and when I try the troubleshooting, the only thing that works is using a different browser. And yet I wasn't having any trouble yesterday at all. Does anyone know what's going on with youtube on Chrome? And yes, I even disabled all of my extensions to check, as well as the cookies; and Chrome is up to date as well.
Are you signed in to an official Google profile through Chrome itself? If you go to settings (chrome://settings/), there should be a field at the top that says 'Sign in' or shows the currently logged in Google account. This is a wild guess, but try signing out if so. Maybe it is conflicting with the other account.