Wirecast is a commercial project that allows you to create powerful and flexible live streaming shows with multiple camera inputs.
We are currently looking at using WebRTC based solutions, and creating our own native screen sharing widgets.
# Wirecast Virtual Camera
To remove the virtual camera simply take the "WirecastVirtualCamera.plugin" file out of the:
/Library/CoreMediaIO/Plug-Ins/DAL/
folder.
# See also
The Wirecast studio utilises Thunderbolt 2 based computer hardware, and HDMI and high quality USB based cameras.
WebRTC (Web Real-Time Communication) is an API definition drafted by the World Wide Web Consortium (W3C) that supports browser-to-browser applications for voice calling, video chat, and P2P file sharing without the need of either internal or external plugins - wikipedia 
Here are some notes on using WebRTC to stream live video to localhost.
Matrix is an open standard for interoperable, decentralised, real-time communication over IP. It can be used to power Instant Messaging, VoIP/WebRTC signalling, Internet of Things communication - or anywhere you need a standard HTTP API for publishing and subscribing to data whilst tracking the conversation history - matrix.org
This Plugin allows you to create a WebRTC Chat Room and embed this in wiki.
Here we explore the idea of using appear.in, instead of Google Hangouts for Fedwiki Happenings. Appear.in is built on top of WebRTC and web standards so we are able to use CSS and HTML to style where and how the video chat rooms appear in wiki.