Show video preview / thumbnail of video using QML

Since Qt5.15 there is a flushMode property in Video. If set to VideoOutput.FirstFrame video shows first frame if playback has reached end of video. How can I show first video frame without starting it. Like a thumbnail or preview regularly seen in OS icon view. I would like to avoid storing additional images next to the videos for that.

As suggested in a Qt bug report you could do it as follows:

    Video {
        autoPlay: true

        onStatusChanged: {
            if (status == MediaPlayer.Buffered)
            {
                pause()
            }
        }
    }