Troubleshooting solutions to fix camera issues on iPhone include letting it cool down, restarting the device, and updating to the latest iOS version.
Ensure apps have camera permission and update or reinstall third-party camera apps that are causing problems.
Free up storage space on the iPhone as low storage can lead to camera app crashes or failures during video recording.
If all troubleshooting fails, check for hardware issues with the iPhone's camera by consulting skilled technicians at Apple stores or authorized service providers.