It looks like this won’t work again with the latest version of MagicMirror.
When I look at Chromium, you can activate the camera on localhost & 127.0.0.1 (permission for this site) but on 0.0.0.0 it is grayed out. Think this will also be the case for Electronjs.
Only possibility I see is;
list itemmake Electronjs authenticate the camera when starting module list itemmake Electronjs authenticate the camera when starting MagicMirrorset camera permission for 0.0.0.0