code: function createVideoEl (src, width, height) {
    var videoEl = document.createElement('video');
    videoEl.width = width;
    videoEl.height = height;
    // Support inline videos for iOS webviews.
    videoEl.setAttribute('playsinline', '');
    videoEl.setAttribute('webkit-playsinline', '');
    videoEl.autoplay = true;
    videoEl.loop = true;
    videoEl.crossOrigin = 'anonymous';
    videoEl.addEventListener('error', function () {
      warn('`$s` is not a valid video', src);
    }, true);
    videoEl.src = src;
    return videoEl;
  }
docs: Create video element to be used as a texture.
  
  @param {string} src - Url to a video file.
  @param {number} width - Width of the video.
  @param {number} height - Height of the video.
  @returns {Element} Video element.