Audio Only when Sharing Screen

When someone is sharing their screen, it might be beneficial for some users who have poor internet connections to have an "audio only" option. currently, to share a screen, you can only use both audio / video (unless if i just can't find it). 

If we could add this, it could be great for podcasts who want to stream to a live and limited audience on the platform. 

Guests / Ticket Holders / Performers structure could be an interesting way to have a "theatre" style system for a podcast.