    void pause(bool pause);
  
    CameraViewWidget *cam_widget;
    QLabel *end_time_label;
    Slider *slider;
  };
 
</s> remove #include <QPushButton>
 </s> add 
  QPushButton *play_btn;
    void pause(bool pause);
  
    CameraViewWidget *cam_widget;
    QLabel *end_time_label;
  QPushButton *play_btn;
    Slider *slider;
  };
keep keep keep add keep keep
 Cabana: click on video to play/pause (#26099) 
tools/cabana/videowidget.h