Live on Facebook using OBS!

Live on Facebook using OBS!

https://www.facebook.com/craig.long.5473

I downloaded the new version of Wirecast to get the Facebook Server URL and Stream Key but did not start streaming using Wirecast:  http://www.telestream.net/wirecast/overview.htm

Just authenticate your Facebook live stream like this:  https://vimeo.com/162406554

Then I took the Server URL and Stream Key information from Wirecast and used it in OBS.

Is there any way that I could hear the output of OBS?

Is there any way that I could hear the output of OBS?  This would be especially useful when playing a video using the Video Source plugin.  Then I could capture the sound and send it into a Hangouts Video Call.  OBS has no virtual microphone, right?
 
I know OBS has no virtual camera but I can share the OBS monitor with the Hangout using other software.  Thanks for your help.

Browser Plugin | Open Broadcaster Software

OBS Browser Source Plugins

CLR Browser Source Plugin for standard OBS version:
Allows you to add web-based content as a source, such as web pages and Flash SWFs
https://obsproject.com/forum/resources/clr-browser-source-plugin.22/

Browser source plugin for OBS Studio (Currently 1.0.6):
This plugin allows you to add web pages as sources in OBS Multiplatform.
https://obsproject.com/forum/resources/browser-plugin.115/
How to install the Multiplatform (incorrectly titled the CLR plugin): https://www.youtube.com/watch?v=YlYERj_2j-I
https://obsproject.com/forum/resources/browser-plugin.115

I've used OBS for only a few days now.

I've used OBS for only a few days now.  
Regarding the OBS MultiPlatform version:
I see that I can Transform > "Stretch to screen" which stretches and can crop which is great to expand my game to 16:9.  
Did they do away with the green lines for cropping?  How can you crop your webcam if I can find a way to add it.  haha
I can't seem to add a video capture device without OBS crashing on both versions.  
This video was made the very first day I had OBS and before I learned how to crop but I am happy with the results:
https://www.youtube.com/watch?v=bNc4iEIHLF8