code: function () {
      var trackedControllerEls = this.trackedControllerEls;
      var self = this;
  
      if (this.isRecording) { return; }
  
      log('Starting recording!');
  
      if (this.el.components['avatar-replayer']) {
        this.el.components['avatar-replayer'].stopReplaying();
      }
  
      // Get camera.
      this.setupCamera(function cameraSetUp () {
        self.isRecording = true;
        // Record camera.
        self.cameraEl.components['motion-capture-recorder'].startRecording();
        // Record tracked controls.
        Object.keys(trackedControllerEls).forEach(function startRecordingController (id) {
          trackedControllerEls[id].components['motion-capture-recorder'].startRecording();
        });
      });
    }
docs: Start recording camera and tracked controls.