It seems, from the explanation on that page, that you either use your Google Account and post on YouTube with the same name and picture you use for your Gmail, or you have a branded account where you can set another name and picture. In neither of both cases email addresses would be shown, it seems (at least, they don't mention anything like that). However, the branded account is described as an account where multiple people can sign in and post content under that account.
From your comments though, it seems you can opt for a branded account even if you're the only one that has access to the account? (and that way post on YouTube under the moniker you choose yourself, regardless of the attached Gmail/Google account)
PS: pretty handy that when clicking the links you provided, I automatically get to see the Dutch-language version of the page.
