Have you heard about full screen Hangouts On Air yet?! Google is making it full screen its Google+ Hangouts On Air. This feature is now the default when only one participant is visible in your broadcast and it would now show a big window with you in it, along with a smaller window under it.
"Looking for a full screen option to your Hangout On Air broadcast? This much anticipated feature is now available by default when only one participant is visible in your broadcast.
If your HOA has multiple participants, you can still achieve full screen by utilizing the Cameraman app to put everyone but the main speaker "backstage"," Google announced in a G+ post.
Hangouts On Air have all the functionality of the regular hangouts with screen sharing, text chat, and up to 9 other video participants. Sharing the live event is as easy as sharing your YouTube URL. The video streams from your Google Plus account to your YouTube channel, where its saved and is available to be viewed later.