YouTube launched this feature in order to lure users from broadcasting on services like Twitch.
Now PC live stream feature has been made easier, if you would prefer going live on your mobile phone, it will also be easier as the feature is coming soon on mobile phones.

YouTube has announced in a blog post that users will soon be able to livestream on YouTube directly from their camera apps. This will first be effective on some mobile phones like Nokia, Samsung, Motorola, LG and ASUS, other phone brands will join the league later on.
To live stream, go to youtube.com/webcam and click on “ Go Live ” to start your stream.