To resolve the issue of missing video face filters on Instagram, you can follow these actionable steps:

1. Restart the Instagram App: Often, simply restarting the app can fix minor glitches. Close the app completely and then reopen it.

2. Clear Cache: On your iPhone, you cannot directly clear the app cache like on Android. Instead, proceed to the next step.

3. Reinstall Instagram: Uninstall the Instagram app and then reinstall it from the App Store. This action will refresh the app and may restore the missing filters.

4. Check for App Updates: Make sure that you are using the latest version of Instagram. Go to the App Store, search for Instagram, and see if there is an update available.

5. Check Device Compatibility: Ensure that your device meets the compatibility requirements for the latest version of Instagram and its features, including filters. If your device is outdated, this could affect functionality - learn more.

6. Permissions Check: Verify that Instagram has the necessary permissions to use your camera. Go to Settings > Privacy > Camera, and ensure that Instagram is enabled.

7. Reset Filters: Sometimes, filters may not appear due to a glitch in saved effects. You can try resetting your saved filters on Instagram or browsing for new filters to see if they reappear - learn more.

8. Report to Instagram Support: If the filters still do not show up after attempting the above solutions, report the issue directly to Instagram through the help section in the app.

By following these steps, you should be able to recover your missing face filters on Instagram. If problems persist, keep an eye on forums where users report similar issues, as it's common for Instagram to experience temporary glitches - learn more.