public class VideoPlayerGui extends GuiScreen {

    private File videoFile;
    private MediaPlayer mediaPlayer;

    public VideoPlayerGui(File file) {
        this.videoFile = file;
    }

    @Override
    public void initGui() {
        super.initGui();

        try {
            // Create a new media player
            mediaPlayer = new MediaPlayer(new Media(videoFile.toURI().toString()));
            mediaPlayer.setAutoPlay(true);

            // Get the embedded media view from the media player
            MediaView mediaView = new MediaView(mediaPlayer);
            mediaView.setPreserveRatio(true);

            // Add the media view to the screen
            this.addRenderableWidget(new GuiVideoPlayer(mediaView, width / 2 - 128, height / 2 - 72, 256, 144));

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public boolean doesGuiPauseGame() {
        return true;
    }

    @Override
    public void onGuiClosed() {
        super.onGuiClosed();

        // Stop the media player when the GUI is closed
        mediaPlayer.stop();
    }
}

这就是他写的代码，讲道理，我觉得有点离谱，但是合理