How to shorten a video on iPhone: four ways, and when each one is right

There are four ways to shorten a video on iPhone: trim the start and end, cut out parts in the middle, tighten the pauses, or speed the whole thing up. The Photos app only does the first. Which one you need depends on where the extra length is, and for a video of someone talking, the extra length is almost never at the ends.

Here is each method with its steps, and a quick way to tell which one your video needs.

First, find where the extra length is

Before you edit, watch the video once and note where the time goes. In a typical talking-head take, it hides in four places:

• Run-up and run-out. The seconds before you start talking and after you reach for the phone.
• Whole passages. A false start, a repeated sentence, a tangent that goes nowhere.
• Pauses. Dozens of small gaps between sentences, each one a little too long.
• Pace. Everything is there for a reason, but the video is simply slower than it should be.

Each one has its own fix.

1. Trim the start and end in Photos

For the run-up and run-out, the built-in editor is the quickest (Apple Support):

1. Open Photos and tap the video.
2. Tap Edit.
3. Drag the handles at either end of the timeline to the new start and stop.
4. Tap Done, then Save Video or Save Video as New Clip.

Save Video can be undone later with Edit, then Revert. Save Video as New Clip keeps the original and adds a shorter copy. This removes only what is outside the two handles. Anything in the middle stays.

2. Cut out parts in the middle

When the extra length is a passage in the middle, you need an editor that can split a clip. In iMovie, which is free from Apple, you split at the start of the unwanted part, split again at its end, and delete the piece between (Apple Support). The full walk-through, including the faster way for talking-head videos, is in how to cut out parts of a video on iPhone.

This is usually where most of the time comes from. A 3-minute take with two false starts and a repeated point can lose a third of its length before you touch the pace.

3. Tighten the pauses

Pauses add up. A 3-minute talking-head take can easily have 40 of them, and if each runs half a second longer than it needs to, that is 20 seconds of nothing. Removing silence is the method that shortens a video without removing anything you said.

On a timeline, you would find each pause by ear and cut it by hand. Desktop editors such as Premiere and DaVinci Resolve automate this with silence detection; the settings that matter, and the ways it can go wrong, are in how to remove silence from a video.

On iPhone, slicecut handles it with one control. After the app transcribes your clip, the pauses sit between the words with their lengths shown. The pause dial sets every pause in the project to a target length at once, for example 0.4 seconds. Pauses that should stay long, such as the beat before your main point, can be pinned so the dial leaves them alone.

Do not set everything to zero. Speech without any pauses sounds rushed. Our measurement of talking-head videos found a median gap of about 0.35 seconds between sentences, with a few deliberately longer pauses in the videos that held attention (How long should a pause be?).

4. Speed the video up

If nothing can go but the video is still too long, you can play it faster. Two things to know on iPhone:

• Photos changes speed only for Slo-Mo clips. Its speed control works on high frame rate footage; it does not speed up a normal video (MacPaw).
• iMovie can speed up any clip. In a movie project, tap the clip, tap the Speed button and drag the slider to the right. You can also split a clip into ranges with different speeds (Apple Support).

Speeding up works for screen recordings, cooking and travel footage. It works badly for speech. Even a small speed-up changes the rhythm of a voice enough that viewers notice, and it hurries the parts you wanted to land as well. If the video is speech, try methods 2 and 3 first. They usually find more time than speeding up would, without changing how you sound.

Which method for which video

Where the extra length is	Method	Tool on iPhone
Before you start and after you finish	Trim the ends	Photos
Mistakes, repeats, tangents	Cut out the middle	iMovie, or slicecut for speech
Many small gaps	Tighten pauses	slicecut’s pause dial
Everywhere, nothing can go	Speed up	iMovie

Most talking-head videos need a combination: trim the ends, strike the false starts, tighten the pauses. In that order, a long take often ends up at half its length with nothing important missing.

How to hit a target length

Platforms have length limits, and short videos often perform better when they are tighter still. If you are aiming at a number:

1. Cut content first, pace second. Removing a weak sentence saves more time than any pause setting, and the video gets better rather than just faster.
2. Then tighten the pauses until you are close.
3. Speed up only as a last resort, and only for parts without speech.

Shortening a video on Android

The steps differ between Google Photos and Samsung’s Gallery. See how to cut a video on Android and how to cut out parts of a video on Samsung.