Hi there! I understand you're having trouble getting the video to show up when trying to add a tube in Ball Sort Puzzle on your iPhone running iOS 18.7. To help you better, could you tell me:

- Are you trying to watch an ad video to unlock the tube, but it simply doesn’t appear at all?
- Is there any error message when you tap to watch the video?
- Have you checked your internet connection to make sure it’s stable while trying this?

This info will help me guide you through the best fix. Meanwhile, I’ll share a few common first steps to try:

1. Check Your Internet Connection
Make sure you have a strong and stable Wi-Fi or cellular connection because video ads need internet access to load.

2. Restart the App
Fully close the Ball Sort Puzzle app (swipe it away from the app switcher) and then reopen it to clear temporary glitches.

3. Restart Your iPhone
Sometimes a quick reboot helps resolve video loading issues.

4. Update the App
Verify the Ball Sort Puzzle app is updated to the latest version in the App Store.

5. Clear Cache (In-App or System) if Possible
Although iOS apps don’t have a direct cache clear option, reinstalling the app can help if the app data is corrupted.

If you have already tried these, let me know so I can give you more advanced troubleshooting tailored to iOS 18.7 and possible app issues.

Are you satisfied with trying these first steps, or would you like me to walk you through more detailed fixes?