iPhone allows us to customize the Camera settings so as to shoot videos in different resolutions and frame rates. For example, on iPhone 8, 8 Plus or iPhone X, you can go to Settings >> Camera >> Record Video, then pick up a video resolution/frame rate. You can capture 1080p HD videos at 30 fps or 60 fps, 4K videos at 24 fps, 30 fps, or 60 fps, 1080p Slo-mo videos at 120 fps or 240 fps.
This change of Camera settings on iPhone however only affect new videos to be captured, not those existing videos saved in your Camera Roll. If you like to edit video resolution on iPhone, you can use iMovie or Videoshop. The former is Apple’s own offering, the latter is the best video editor for beginners. Each fits in its own little niche. It’s hard to say which is better. Today we’d like to show you how it can be done using Apple’s video editor, iMovie for iOS.
Launch iMovie on iPhone. Switch to the Project tab from the top and create a new project, tap the + icon, select Movie, then tap to select the video and touch Create Movie at the bottom to load the selected video clip in the project. You can go to edit the video now if like. Tap Done button at the top left corner, then tap Share >> Save Video, you will then get the export size selection menu with various video resolutions and sizes.
Medium – 360p, Large – 540p, HD – 720p, HD – 1080p. If the source video is 4K UHD, you will also get the 4K resolution option in the above export size list. Choose a video size here, then the movie will be exported to your Photo Library immediately.
Compress videos on iPhone
Decrease the video resolution can help you make the video files smaller, thus save the storage space on iPhone, and save your bandwidth or data when you transfer the videos to others using your cellular data when a Wi-fi network is not available. Check out this tutorial to compress iPhone videos through which you can learn different ways to reduce file size of those heavy videos and movies on iPhone.