For years, the space podcast I co-host used Hangouts on Air to record live episodes. When Google shut it down, we switched to StreamYard
Besides making for a suitable replacement, StreamYard offers additional video streaming features such as screen layout controls, banners, and more. Google Slides is an ideal companion for a cloud platform like StreamYard as there’s nothing to download and you don’t need local processing resources.
Have a look at the article on running a Google Slides presentation in StreamYard, which may come in handy also in educational and business settings.