catch and pass on error when trying to play video without a valid source (NotSupportedError)

src/input/camera_access.js

@@ -40,15 +40,14 @@ function waitForVideo(video) {
 function initCamera(video, constraints) {
     return getUserMedia(constraints)
     .then((stream) => {
-        return new Promise((resolve) => {
+        return new Promise((resolve, reject) => {
             streamRef = stream;
             video.setAttribute("autoplay", true);
             video.setAttribute('muted', true);
             video.setAttribute('playsinline', true);
             video.srcObject = stream;
             video.addEventListener('loadedmetadata', () => {
-                video.play();
-                resolve();
+                video.play().then(resolve).catch(reject);
             });
         });
     })