&sstype123screensharetype=1 replaces the webcam screen with the screen sharescreensharetype=2 creates a totally new connection for the screen sharescreensharetype=3 reuses the existing connection, adding a second video track; also doesn't show the local screen share windowscreensharetype=3 become the standard for sharing screens eventually, but for now it will remain optional, until the issues are all worked out.&screensharetype=3 screen share, you can now use &view=xxxx:s, where :s is appended to the end of the stream ID. This tells the system to ignore the webcam/mic feed, and just send over the screen share. You can do &view=xxxx,xxxx:s to target both webcam and screen share though. I may change this syntax over time, but for now it works. The solo-links in the director's room has this :s applied already where needed.