Windows: A problem with QVideoWidget:: fullScreen

class VideoWidget: public QVideoWidget {
   Q_OBJECT

public:
    VideoWidget() : QVideoWidget() {
        setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        auto p = palette();
        p.setColor(QPalette::Window, Qt::black);
        setPalette(p);
        setAttribute(Qt::WA_OpaquePaintEvent);

        auto player = new QMediaPlayer();
        player->setVideoOutput(this);
        player->setMedia(QUrl("video.mp4"));
        player->play();
    }

    void keyPressEvent(QKeyEvent* event) {
        if (event->key() == Qt::Key_Escape && isFullScreen()) {
            setFullScreen(false);
            event->accept();
        } else {
            QVideoWidget::keyPressEvent(event);
        }
    }

    void mouseDoubleClickEvent(QMouseEvent* event) {
        setFullScreen(!isFullScreen());
        event->accept();
    }
};

QWidget w;
auto layout = new QVBoxLayout();
layout->setContentsMargins(0, 0, 0, 0);
layout->addWidget(new VideoWidget());
w.setLayout(layout);
w.show();

QMainWindow mw;
mw.setCentralWidget(new VideoWidget());
mw.show();