Updates :
✔ Added Chat History
✔ Removed Users Email info from connected Users List.
✔ Integrated with hangout notifications on new message.
✔ Bug fixes.

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Hangouts On Air is moving to YouTube Live
Hangouts On Air will no longer be available on Google+ as of 12 September 2016.
Q&A, Showcase, and Applause - These apps will not be available on YouTube Live.
Check Out this new hangout extension going viral as a replacement of hangout default chat extension.
And can be used to collect questions before event like Q&A app.

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Screenshots :

This is how it looks inside hangout and to the live event audience.
2 Photos - View album
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