To broadcast from Socialive into YouTube, you'll need to enable live video within your YouTube account.
Go to https://www.youtube.com/live_dashboard and click the "Get Started" button:
You'll then be asked to verify your account:
Your live account should be available within 24 hours:
Once your YouTube account is enabled for live streaming, you stream to YouTube using the Server URL and Stream Key provided at https://www.youtube.com/live_dashboard
Simply copy and paste the Server URL and Stream Key into Socialive to add YouTube as a distribution channel.