How to use your youtube account instead of google plus account on iphone 5s?

I need to know

1. Sign in to YouTube.
2. Go to All my channels and choose the top-left option that shows your full name or email address.
3. Go to the advanced accounts settings page. Http://www.youtube.com/account_advanced
4. Pick the channel you want to use in the dropdown under Signing in to older apps.
5. Now when you sign in on these apps with your Google Account email and password, you'll be signed in to the channel you picked.