Hello! I see you're having trouble playing videos on Weverse using your iPhone. Let me help you get this sorted out. To better assist you, could you please tell me:

- Are you using the Weverse app or accessing Weverse through a browser on your iPhone?
- Does the video fail to play entirely, or does it start and then stop or buffer?
- Have you noticed any error messages when trying to play the video?

Meanwhile, here are some steps you can try to fix video playback issues on Weverse with iOS 18.5:

1. Check Network Connection:
Ensure you have a stable internet connection—Wi-Fi or cellular data—and that the connection is fast enough to stream videos. Sometimes videos won't play smoothly on slow or unstable networks.

2. Restart the Weverse App:
Close the Weverse app completely by swiping it away in the app switcher, then reopen it and try playing the video again.

3. Update Weverse App:
Make sure your Weverse app is updated to the latest version available in the App Store. App updates often include fixes for playback issues.

4. Restart Your iPhone:
Sometimes, a simple restart can solve temporary glitches affecting video playback.

5. Check iOS Version:
While you mentioned you are on iOS 18.5, it’s worth making sure your system is fully up to date with the latest minor updates from Apple.

6. Clear Cache or Reinstall the App:
If possible, try deleting the Weverse app and reinstalling it. This can clear any cached data that might be causing playback problems.

7. Test Another Video:
Try playing a different video on Weverse to check if the problem is with a specific video or all videos.

If after these steps the problem still persists, there may be additional causes such as a temporary issue with Weverse servers, content restrictions, or account-related problems.

Please try these out and let me know the results. That way, I can guide you through more specific troubleshooting if needed! Are you using the Weverse app on your iPhone or visiting the website via a browser?