This article assumes you read this article and know how to run a live webinar with OBS. If not please read this first.

How to run a live webinar with OBS

You can show any app in your desktop using Open Broadcaster's "Window Capture" source.

To do so, open your OBS app. In "Sources" click on "+" button and from the options, select "Window Capture". Then give it a name, and in the next popup, from "Window" select what you want to show the attendees. e.g. I selected my browser tab that I wanted to show.

You can resize the source in the preview if you want to just show a certain part of the app.

That's it! Now follow this tutorial to start your live webinar!

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