Youtube live stream feature broadcasts your radio music to Youtube live. There is a daily live stream limit on youtube, do not restart the live stream more than 7 times a day.
Go to the https://www.youtube.com/livestreaming/ and activate live stream features. Keep Youtube live stream page open before starting the live stream.
Youtube takes 24 hours for activation. Copy your live stream key and enter on your Youtube Live Stream page (Dashboard>Youtube Live Stream), upload a 1280x720 size picture.
The live stream will start after 30-40 seconds on Youtube.