Google-hangouts – How to delete a person in the Google Hangouts

They default that list to 10 people. Unfortunately there is no way to remove the arbitrary list of people. If I understand your observation correctly, it also occurs when you start typing a contact's name in the search box as if you were going to chat/(hangout) with them.

Even though it sounds a little awkward I can think of the following:

1. Both recorders join the Hangout (Speaker + Audience).
2. Two viewers join from one computer (need two accounts), one selects the Speaker, one the Audience.
3. On the viewer-computer arrange the two windows any way you want to divide it.
4. Share that computer's screen.

I don't know any way to do it out of the box in Hangouts, but this is a possibility that could work—or even multiple different views.

Of course the delay increases. So ensure you are testing it and ensure sound is synchronous.