[Bug] Background video not playing as expected on AstroDX 2.0.0 Beta 6 Patch 2

### ⠀

- [x] This issue is not duplicated with any other open or closed issues

### Describe the bug

I checked that all the settings items about background videos in the game are set correctly and play the level after the game is played. But the background video did not appear.

### Expected behavior

The background video appears normally in the background of the level.


### Steps to reproduce

1. Download and install AstroDX 2.0.0 Beta6 Patch2 version;
2. Open the game;
3. Play a level containing background video.

### Device information

Device: Xiaomi Pad 7 Ultra (25032RP42C)
System: HyperOS 3.0.0.8 Beta (Based on Android 16)
Version: AstroDX 2.0.0 Beta 6 Patch 2


### Screenshots



### Additional context

_No response_

The issue is about background video playback in AstroDX, a Unity game for Android. Start by checking the video player component and rendering pipeline in Unity. Look at level loading and background video initialization code. Verify Android-specific video codec support and permissions. Test on an Android device to reproduce the issue.

Written by the indexing model from the issue text.