Hi! I see you're having trouble downloading with the Snaptube app on your Android device. Could you tell me a bit more about what exactly happens when you try to download? For example, is the app not starting the download, is it stuck, or do you get an error message? This will help me guide you better.

In the meantime, let me share some common fixes that usually help resolve Snaptube download issues on Android 15 with WebKit:

1. Check Internet Connection
Make sure your internet connection is stable, as downloads can fail if connectivity drops.

2. Enable Installation from Unknown Sources
Since Snaptube is not from the Google Play Store, ensure you've allowed installations from unknown sources:
- Go to Settings > Apps > Special app access > Install unknown apps
- Find your browser or file manager and allow it to install apps.

3. Clear Cache and Data of Snaptube
Sometimes cached files cause issues:
- Go to Settings > Apps > Snaptube > Storage
- Tap "Clear Cache" and then "Clear Data"

4. Grant Necessary Permissions
Make sure Snaptube has permission to access storage and other needed features:
- Settings > Apps > Snaptube > Permissions
- Enable permissions like Storage access.

5. Update Snaptube and Your Device
Check if a new version of Snaptube is available and update it. Also, make sure your device's system software is up-to-date as compatibility can affect downloads.

6. Disable Battery Optimization for Snaptube
To avoid the system stopping downloads in the background, disable battery optimization for Snaptube:
- Settings > Battery > Battery Optimization > Snaptube > Don’t optimize

If you've tried some of these already, please let me know which ones, and if you see any specific error messages or behavior. That way, I can help with more advanced steps or targeted solutions.

Are you comfortable walking through these steps together?