QML Video Example - Multi Mode Camera Feed Issue

Description: In the Video Example Application, when using Multi Mode, clicking the center box to start camera feeds does not display any output on the screen. However, in Camera Mode, the camera feeds render flawlessly.

Steps to Reproduce:

1. Launch the QML Video Example Application.
2. Switch to Multi Mode.
3. Click on the center box to start the camera feeds.
4. Observe that no video feed is displayed.
5. Switch to Camera Mode.
6. Observe that the camera feeds render correctly.

Expected Behavior: When clicking the center box in Multi Mode, the camera feeds should start and be displayed on the screen.

Actual Behavior: No video feed is displayed. However, the camera feeds work correctly in Camera Mode.

Environment:

• Operating System: macOS[Monterey]

• Qt Version: 5.15.19