How to Turn Long YouTube Videos into Shorts with AI

To turn a long YouTube video into Shorts with AI, start with the original video file, let a clipping tool suggest moments, and review each selection before exporting it as a vertical video. The essential editing decision is choosing a moment that makes sense to someone who has never watched the full episode.

This guide walks through that process using our YouTube to Shorts converter. It works from uploaded source files, so have the recording behind your YouTube video ready before you begin.

1. Choose your source video

Start with a video that contains clear answers, explanations, or short stories. An interview with several focused answers gives you natural places to look. A tutorial can work too, provided the viewer can understand the demonstration in a narrow frame.

For your first attempt, choose a recording with clear speech and one topic you know well. That makes it easier to judge whether the AI has preserved the speaker’s meaning.

Use the original MP4, MOV, M4V, or WebM file. The current upload workflow accepts sources up to 60 minutes long and 2 GiB in size. It does not import a source by pasting a YouTube URL, and connecting your channel is not required to generate clips.

2. Upload the file and generate clips

In your workspace, choose Upload a new video, select your file, and use Upload & create clips.

The tool transcribes the recording and uses the transcript to propose moments for short clips. It then renders the selected footage in portrait format with captions.

Treat the results as candidates for your review. AI can find a promising passage, but a transcript does not reveal everything that makes an edit work. A speaker may point to something outside the crop, refer to an earlier explanation, or deliver a sentence whose meaning changes when the setup is removed.

You do not need to publish every generated clip. Choose the ones that give viewers a complete, useful idea.

3. Pick a moment with its own beginning and ending

Watch each candidate without first replaying the full source. Ask whether a new viewer can understand the opening sentence and explain the takeaway afterward.

For example, imagine a longer interview about recording podcasts. A passage begins:

“That was the thing that finally fixed it.”

The statement might sound intriguing, but it has no clear subject on its own. Starting a little earlier, where the speaker says “Moving the microphone closer reduced the room echo,” gives the viewer the missing context.

This is an illustrative example, not a generated result. The editing principle is to include enough setup for the answer to mean something.

Check three things:

• Opening: Does the first sentence name the topic or establish a clear question?
• Middle: Does every included sentence help explain that same idea?
• Ending: Does the clip finish after the answer, example, or payoff?

Avoid an ending that cuts off a qualification. “This works, unless…” needs the rest of the sentence.

4. Review the vertical frame and captions

The tool exports portrait MP4s at 1080 × 1920. Watch the actual rendered clip to check that the crop keeps the important content visible.

For an interview, look at the speaker’s position when they move. For a demonstration, check the object or screen the speaker is explaining. A readable face does not help if the example has been cropped out.

Then review the captions with the sound on. Pay particular attention to names, numbers, specialist terms, and words such as “not” that can reverse a sentence’s meaning. Check that captions do not cover something the viewer needs to see.

You can request a revised clip with specific written feedback. For example: “Include the sentence that explains which microphone is being discussed.” Direct trimming and subtitle word corrections depend on whether the optional manual editor is enabled in your workspace.

5. Check the duration and export

YouTube currently classifies new square or vertical uploads of up to three minutes as Shorts. That is the platform’s limit, not a target you need to fill. See YouTube’s Shorts duration guidance.

Let the idea determine the length. If the answer is complete in 35 seconds, adding a second topic can weaken the clip. If the explanation needs more context, cutting it too tightly can make it confusing.

Before downloading, play the clip from start to finish and check:

• The first and last words are audible and complete.
• The selected footage preserves the speaker’s meaning.
• The subject and any necessary visual details remain visible.
• Captions match the speech.
• The title accurately describes this clip.

Download the finished MP4 when it is ready. Media stays available until you delete it, within your workspace storage limit.

6. Upload your Short to YouTube

You can upload the exported file through YouTube Studio. Choose Create, then Upload videos, select your clip, and complete the details and visibility settings. YouTube documents the process in its Shorts upload guide.

Write a title around the specific idea in the Short. For the microphone example, “Reduce Room Echo by Moving Your Microphone” tells the viewer more than the original interview’s episode title.

If you connect YouTube to your clipping workspace, you can instead explicitly approve a clip for upload there. Generating clips alone does not publish them.

Frequently asked questions

Can I turn a YouTube link directly into Shorts?

This tool requires the source video file. Upload the recording from your device; a YouTube connection is used for approved publishing, not source imports.

Does AI choose the best clip automatically?

It proposes selections based on the spoken content. Review those selections for context, pacing, and visual clarity. A strong candidate still needs your judgment before it is ready to share.

Do Shorts have to be under 60 seconds?

No. YouTube’s current guidance allows square or vertical Shorts up to three minutes. Your generated clip’s length also depends on the clipping tool’s settings and the available source material.

Where should I start?

Choose one source video and aim to finish one clear, complete Short. Follow the YouTube to Shorts workflow, review the result, and export the moment you would be comfortable showing to someone unfamiliar with your channel.