There's been a new surge of interest in streaming Webex Meetings to Facebook Live to easily accommodate large groups of users and to do chat questions with live responses from a panel of speakers on a Webex meeting (Town hall meetings, large team meetings, company meetings, emergency response, etc...)
To help, all the information needed to do this was put in one place to make it easy. See
Now Webex streams to YouTube, Twitter, Facebook, and all stanard RTMP streaming services. See https://blog.webex.com/webex-meetings/live-streaming-with-webex-meetings-for-your-virtual-events-whats-new-and-how-to-use-it/
Yes, If you want to live stream to a Facebook group, the group admin must add the Cisco Webex Meetings app to the group.