Right, he still has access to his Google account, but he can't use YouTube from that account. In fact, he can't create a new account and login to YouTube from any of his devices. His only access to YouTube at this point seems to be through non-logged in access.
You mean that he can’t open YouTube at all, not even to watch videos?!
>Now their automated system keeps banning every YouTube account he creates within days of creation.
Yes, it is. I am not going to create new accounts, it is fundamentally important for me to reinstate my own account.