Tom moved to another state and his Gmail account has been locked out. How can he get back control of it? Google says he has to go back to the old location to recover it. This is why you use an alternate address for recovery. But if that doesn't work, you may be out of luck since there's no support. Leo says before anything happens, to do the security checkup. Turn on 2-factor authentication, and set up a secondary email that isn't Gmail for recovering it. Also, periodically, back up your email through Google Takeout.
John Paul is having a hard time recovering his Gmail account. What can he do? Leo says it's very difficult to recover your Gmail because there's really no one to talk to. Gmail is a free service and doesn't offer support. If you had the paid version, GSuite, you'd have support. But since this is free, you're really at the mercy of the support documents. One way to prevent this is to turn on 2-factor authentication. That way you get a text message with a code that you input, or you use an authenticator.
Bobby's wife has forgotten her Gmail password and would like to recover her account. Leo says that Google has an account recovery process, but as users get deeper into it, it gets harder to succeed. Google has no real tech support other than automated answers. Check in her browser to see if it has saved her password.
Greg has an old, inactive Google account, but when he tries to recover his password, it won't verify. Leo says it's possible that the account was deleted due to inactivity. The chatroom points to this support article at support.google.com for recovering a lost account. Though Greg's account isn't lost, maybe treating it as a lost account could solve the problem.