There is one huge difference, if I'm not mistaken. In our tests neither Skype nor Google Hangouts allowed the speaker of a talk to view the audience while scree

There is one huge difference, if I'm not mistaken. In our tests neither Skype nor Google Hangouts allowed the speaker of a talk to view the audience while screen sharing. It's annoying and feels very odd to give a two-hour lecture to your laptop with zero feedback from the audience. Maybe we did something wrong, though, and missed features in Hangouts and Skype. If that is the case I'd be very happy if someone could point it out to me. (Our whole university is using Google Hangouts right now, because our administration doesn't want to pay for additional Zoom subscriptions.)