Remove video autoplay for consistency accross browsers

Author: dmarcos

examples/boilerplate/360-video/index.html

@@ -17,7 +17,7 @@
         URL:    https://bitmovin.com/demos/vr-360
         -->
         <video id="video"
-               autoplay loop
+               loop
                crossorigin="anonymous"
                playsinline webkit-playsinline
                src="https://bitmovin-a.akamaihd.net/content/playhouse-vr/progressive.mp4">