You can perform network streaming using RTMP protocol to stream live video to YouTube or other services that support RTMP.
In Main Demo enable Network streaming, select RTMP streaming using FFMPEG.
In URL text box you must enter URL and key that you received on YouTube. Usually URL is like "rtmp://a.rtmp.youtube.com/live2", key is like "2taa-6j9s-4rrs-6eepj" . You must combine it: YOUTUBE_URL/KEY, and enter it in Main Demo.
Press Start, after several seconds you'll see video stream on YouTube.