With recent updates to Webex Meetings desktop app, using a third-party virtual camera app has been restricted. However, you are able to use the virtual camera with the Webex Meeting web app in a Firefox browser. At the time of writing, I was able to make this work using the CamTwist app, Firefox browser on my MacOS Catalina.

It's now a new normal to meet online using video conferencing software for just about everything, because of this COVID-19 pandemic. With millions of things you can possibly do online, you may need to legally protect yourself and or your organization when broadcasting by adding a copyright disclaimer at the bottom of your video.