Add play button for devices with autoplay restrictions

public/index.html

@@ -45,6 +45,14 @@
           }, 1200)
         }, false);
 
+        // Handle autoplay restrictions.
+        var promise = videoElement.play();
+        if (promise !== undefined) {
+          videoElement.addEventListener('click', function() {
+            videoElement.play();
+          });  
+        }
+
         player.play()
       }
     })()