视频播放的关键代码如下：

使用Qt6的QMediaPlayer，QVideoWidget实现

void FunnyWidget::initVideo()
{

    player = new QMediaPlayer(this);
    videoWidget = new QVideoWidget(this);
    playButton = new QPushButton("Play", this);
    pauseButton = new QPushButton("Pause", this);
    stopButton = new QPushButton("Stop", this);

    // 设置视频输出
    player->setVideoOutput(videoWidget);

    // 设置按钮布局
    QHBoxLayout *buttonLayout = new QHBoxLayout;
    buttonLayout->addWidget(playButton);
    buttonLayout->addWidget(pauseButton);
    buttonLayout->addWidget(stopButton);

    // 主窗口布局
    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(videoWidget);
    mainLayout->addLayout(buttonLayout);

    QWidget *centralWidget = new QWidget;