**Bug: MP4 video upload fails silently in version 3.30.0**

### ⚠️ Before posting ⚠️

- [x] This is a **bug**, not a question or an enhancement.
- [x] I've [searched for similar issues](https://github.com/nextcloud/android/issues) and didn't find a duplicate.
- [x] I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
- [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/).

### Steps to reproduce

When trying to upload MP4 videos via the "+" button or the Android share sheet, the app redirects back to the folder immediately without starting the upload. No progress bar, no error message.

**Steps to reproduce:**
1. Open Nextcloud app and navigate to any folder
2. Tap "+" and select an MP4 video
3. App redirects back to folder – no upload starts

**Expected behavior:** Upload starts and progress is shown

**Actual behavior:** Silent fail, redirected back to folder immediately

**Additional info:**
- Photo uploads work fine
- Upload via web browser works fine
- Android Share Sheet also affected
- App version: 3.30.0
- File format: MP4

### Expected behaviour

Upload starts and progress is shown

### Actual behaviour

Silent fail, redirected back to folder immediately

### Android version

15

### Device brand and model

Fairphone 4

### Stock or custom OS?

Stock

### Nextcloud android app version

33.0.0

### Nextcloud server version

dont know

### Using a reverse proxy?

I don't know

### Android logs

_No response_

### Server error logs

```bash

```

### Additional information

- Photo uploads work fine
- Upload via web browser works fine
- Android Share Sheet also affected
- App version: 3.30.0
- File format: MP4