Hi! I understand you're experiencing slowness with YouCut. To help you best, could you tell me a bit more about the issue? For example, is the app running slowly while editing, exporting, or at some other time? Also, is this happening with all videos or just larger or specific ones? The more details, the better I can guide you.

Meanwhile, here are some general steps you can try on your Android 10 device with WebKit:

1. Close Background Apps: Ensure you have closed unnecessary apps running in the background to free up memory and processing power.

2. Clear YouCut Cache:
- Go to your device’s Settings > Apps > YouCut.
- Tap on Storage.
- Select "Clear Cache" to remove temporary files that might slow the app.

3. Restart Your Device: Sometimes a simple reboot can resolve temporary slowness.

4. Reduce Video Resolution While Editing: Editing high-resolution videos can be demanding. Try lowering the preview resolution within YouCut settings, if available, for smoother performance.

5. Free Up Storage Space: Make sure you have sufficient storage space on your device since low storage can impact app speed.

6. Update YouCut: Check if there's an update available on the Play Store to ensure you have the latest performance improvements.

If you’ve already tried these or still face slowness, let me know. We can then look into advanced settings or app reinstall, and I can help troubleshoot further or check for any known issues.

Does that sound okay so far? Could you also share any specifics about when YouCut feels slow?