Hi! Sorry to hear VLC isn’t opening on your iPhone and just flashes before going back to the home screen. Let's try to figure this out together.

Just to clarify a couple of things for me:
1. When did this problem begin? Was VLC working fine before?
2. Have you recently updated your iPhone to iOS 18.4.1 or updated the VLC app before this started?
3. Have you tried restarting your phone or reinstalling VLC already?

Once I know a bit more, we can go step-by-step. Meanwhile, here’s a simple first approach:
- Close the VLC app fully (swipe it away from the app switcher).
- Restart your iPhone to clear temporary glitches.
- Open VLC again and see if it launches.

If that doesn’t help, the next step would be:
- Delete the VLC app from your iPhone.
- Go to the App Store and download the latest version of VLC again.

Corrupted app data or outdated versions sometimes cause crashes like this. Reinstalling fresh could fix it.

Let me know what you’ve tried or any other details you notice! We’ll get VLC working for you.