When I type in my youtube account name and login, ittakes me to a page that says "Do you already have a youtube account" and another login, when I type my details in again it says "That account is linked to a different gmail account" then when I go to the main page to try agian, it says my username with @gmail.com on the end How do I log into my Youtube account?

Have you tried the standard account recovery methods to find out what your real login details are?

Sadly, I no longer use the email I started the Youtube account with, it hasn't been a problem (until now)