i could get the webcam texture from this project.
But if I fork this project, and try launch. I can see my browser was using camera with lights on. And camera was in use shows in chrome. But the texture was black. Even my old project were used to work in month ago, but now i launch in editor was not working any more. But what i published copy, was still working. I was thinking is that a bug from engine version update ?
select the Screen material, and change the emissive color from black to white.