 * Text for link. Not displayed to visual users --
           * for screen readers only.
           */
          text: {
            type: String,
            value: 'Search #io16 on Twitter'
          },

          _firstLoad: {
            type: Boolean,
            value: true
          }
        },

        show: function() {
          // Some browers (Chrome) re-fire canplaythrough when you call
          // video.play().
          if (this._firstLoad) {
            this.$.video.hidden = false;
       