Have been playing with Vdo.ninja, a free solution by the dev of OBS Studio which makes it possible to stream and receive multiple sources through any web-based view. In practice, it can do what Cleanfeed does, except it's not as heavily Chrome-dependent, allows for things like changing audio inputs and outputs for other people which makes it so much easier for sound technicians to tweak the setup for radio show or podcast guests, and all of the parameters can be tweaked through URL parameters so it is easy to hand out customized invitation links with everything pre-configured for each guest. The dev, I am told, cares deeply for #Accessibility and, although some suggestions could still be implemented, it is rather pleasant to work with at present. vdo.ninja/