Cited as a reference · for some experience
Full HD Screen/Window & Audio RealTime Mirroring from PC to RaspberryPi with the browser
Why people recommend it
A demo of UV4L streaming between a browser and a Raspberry Pi, linked to show that browser based screen and camera casting works without add-ons.
Watch for: a demo, not a step by step guide
In their words
Have a look at the UV4L demo and this post and the following posts on the Raspberry Pi forum for a working command line.
sminkiom on raspberrypi.stackexchange.com, Jan 2017. CC BY-SA.