What security concerns though? It's not like accessing the camera on a random attacker controlled HTTP page is less secure than on a random attacker controlled HTTPS page. If the user lets a malicious web page access the camera, that's game over regardless.
I'm all for doing stuff to tell users that the HTTP page they're visiting is insecure, but telling people who are new to web dev to get a domain and learn how the world of SSL and domains work is actually a pretty fucking big hurdle. They'll have to get into that if they want to get serious about it, sure, but there's no reason to unnecessarily front-load the frustrating and complicated and unrelated parts. You may think it's acceptable, I value the web's accessibility to new developers.
Surely there's better ways to convince sites to use HTTPS than to say they can't use getUserMedia on HTTP.
