Toggle Fullscreen in Hangout is an extension that can be installed on your Google Chrome browser. When you are using Google Hangouts, this will help you to maximize the video/screencast part of a Hangout and have it fullscreen if you toggle the browser with presentation-mode or f.

It is a great way to watch a video or a presentation, while still being able to interact. This extension was developed to help users who want to present an online video or screencast and still be able to interact outside the app.

You can use this extension for all the Google Hangouts videos that you will encounter, whether they are in a meeting, an online class, or a virtual classroom.

You will not be able to make a video call with this extension installed, because the video will be sent to the browser and not to the fullscreen.