Author of the js side here. I'll definitely look into seeing how much extra bulk will be needed for this. We're trying to keep the file as small as possible and generally as cross-browser friendly as possible.
What kind of things are you doing that you need to share a screen? If it's mostly document based can using Google Docs be used? Skype also has some screen sharing abilities I think.
Add a datetime check so I can set it and forget it.