case 'Prev':
    if (this.playlistCursor - 1 >= 0)
    {
    if (this.myVideoDisplay.playing) { this.myVideoDisplay.pause(); }
    this.myVideoDisplay.playheadTime = 0;
    this.playlistCursor--;
    this.playVideo();
    }
    break;
   default :
    break;
   }
  }