If you were watching a live YouTube broadcast via your computer in the past, you’ve had the ability to push it straight to your Chromecast if you wanted to. But if you wanted to do the same from your mobile device, you were not able to.
But today, Google has updated the feature, now letting you push live events on YouTube straight to the TV screen via Chromecast on your mobile device.
While the feature apparently has been out “a little while ago,” Google hasn’t mentioned it until a post on Google+ today.
Source: +Google Chrome