Video/stereo doesn't work with example

[Kjos]

The example doesn't play anything with the latest AFrame.

Below works fine for me.

    <a-scene>
      <a-assets>
        <video id="video" autoplay loop crossorigin="anonymous" src="videos/MaryOculus.mp4"></video>
      </a-assets>

      <a-camera position="0 0 10" stereocam="eye:left;"></a-camera>


      <a-videosphere src="#video" rotation="0 180 0" play-on-window-click play-on-vrdisplayactivate-or-enter-vr
              material="shader: flat; src:#video;" 
              scale="-1 1 1" stereo="eye:left"></a-videosphere>

      <a-videosphere src="#video" rotation="0 180 0" play-on-window-click play-on-vrdisplayactivate-or-enter-vr
              material="shader: flat; src:#video;"
              scale="-1 1 1" stereo="eye:right"></a-videosphere>

    </a-scene>

[arthurmougin]

check that: #28