If you’ve recorded a video file with your iPhone and the video has been saved in the gallery, but you’re not able to play it back, the reason could be that the video is actually located in your iCloud account, not in the iPhone’s storage. After you take your photo, open the photo in the Photos app and … 'The problem I'm having is the recorded videos won't play on my iPhone. Just delete the file and check playback again. * Click Crop in the basic editing panel to crop the video area and change the aspect ratio from 4:3 to 16:9 that your iPhone recognizes. Change frame rate, such as 60fps to 30fps or 25fps.
Tap on Settings > go to Safari > scroll down and Clear History and Website Data to get rid of the caches, cookies, and browsing traces. Users encountered the problem that iPhone won't play GoPro HEVC videos, especially the 4:3 videos even with lower resolutions and frame rates. Tap Updates and look for the app in the pending updates > click Update > enter Apple ID password if asked > go back to the app and see if the video not playing on iPhone issue is fixed.
