Open a video shot in Slo-mo mode to open it in full screen, then tap Edit in the top-right corner of the screen. Scroll down to the Media Types section, tap on Slo-mo to find all videos recorded in slo-mo mode. Switch to the Albums tab from the screen bottom. Then choose Duplicate from the drop-down menu to create a copy of the original video in your photo library. Tap on the video to open it, then tap on the More menu button, which looks like an ellipsis in a circle, in the top-right corner of the screen. Open the Photos app on your iPhone and find the video that you want to adjust the speed for.

That way if you directly modified the original video file in the photo library and made a mistake, you can revert to your saved copy. It is strongly recommended that you backup a file before editing. You will learn how to convert or change slow-mo video to normal speed, and turn normal videos to slow-motion videos or speed up videos on iPhone.

Today, we will show you how to edit video playback speed on iPhone, not only those slow-mo videos but also videos at regular speed. When you want to watch long videos in a short time, you can increase the playback speed when you need your audiences to focus on certain parts of the video, you can slow it down. Sometimes, we may like to edit the playback speed of our videos.

And if you use an earlier iPhone model or iOS version, the stock Camera app does not support slow-motion or time-lapse video at all. But it lacks the flexibility to slow down video, speed up video, edit iPhone video speed like 1/4X, 1/2X, 3/4X, 2X, 3X, etc. Recent iPhone models and iOS versions have a new feature called SLO-MO which allows user to record slow motion videos using iPhone.

Make imovie vertical on iphone