[QML Video Recorder] Video playback unsupported, only audio playing

Steps to Reproduce:

1. Open Example and build it using kit 'Desktop Qt 6.2.10 GCC 64-bit'
2. Run it and record video
3. Play that recorded video

Actual Results:

There is a white screen with audio running in the background, no video.

Expected Results:

Video is played along with the audio.

Reproducibility:  100%

Error: Unsupported video codec.