Delete what is held about you
No account and no email address. Take a code from this page, post it from the YouTube account you chatted with, and it is done. There is nothing to come back to and nothing to confirm.
What we keep explains what there is to delete.
If you have an account here, sign in instead. Being signed in proves which record is yours far better than a code does, so a code will not delete an account. Sign in and use the danger zone at the bottom of your account page.
Take a code
Each code does one thing and can be used once. You do not need to know whether a deletion is already running: ask for what you want, and asking twice changes nothing.