Turning a long video into Shorts comes down to four moves: find moments that stand on their own, cut each to roughly 20 to 60 seconds, reframe it to vertical 9:16 on whoever is speaking, and open on the strong line with captions burned in. A 20-minute interview, webinar or tutorial usually holds several Shorts.

This guide follows the same order you would work in: pick the moments, cut them, reframe them, fix the opening, then publish.

What makes a good moment for a Short?

Do not scrub the video looking for "the best parts". You will either find thirty or none. Look for specific types of moments instead:

1. The direct answer: a clear question followed by an answer in under a minute. 2. The surprising number or fact: a figure, date or comparison that makes people react. 3. The demo: a hands-on move, a before-and-after, a screen you can show. 4. The story: a short anecdote with a setup, some tension and a payoff. 5. The strong opinion: a clear take people will agree or argue with.

YouTube's own creator advice says the same thing in different words: highlight the hook, pull the most exciting, funny or informative segments, and extract single actionable steps from tutorials.

How do you find those moments fast?

Work from the transcript, not the timeline. Generate a transcript (YouTube Studio, your editor or any transcription tool), read it, highlight sentences that make sense with no context, and note the start and end timestamps. Reading ten pages of text is faster than watching twenty minutes of video, and you can see exactly where an idea begins.

If you would rather not do the first pass by hand, Free Clip Map takes your video and returns 10 candidate Shorts with timestamps. It is free. Treat its list as a shortlist, then watch each candidate before you cut.

How long should each Short be?

The 20 to 60 second range is not a platform rule. It is simply how long one well-told idea tends to take. Trim to the idea, not to a target length.

How do you cut a Short out of a long video?

Option 1: YouTube Studio (no extra tools). Open YouTube Studio, go to Content, pick the video, select Clips and Shorts, then Create clip or Short and choose Short. Select the segment from the transcript or enter timestamps, preview, adjust captions, and click Create Draft. The source video is linked to the Short automatically as a related video. On the YouTube mobile app you can also tap Remix → Edit into a Short on a public video you uploaded.

Option 2: your editor. Drop the long video on the timeline, cut at the timestamps you noted, and export each clip as its own vertical project. This gives you full control over framing and captions.

Either way, cut right before the strong line. Leave out the warm-up.

How do you reframe a horizontal video to 9:16?

Most long videos are 16:9. Going vertical means deciding what matters in the frame, not adding black bars.

• One person talking: crop tight on face and upper body, eyes in the top third.
• Two people: switch the frame to whoever is speaking, or stack both faces.
• A screen or demo: zoom in on the useful area and add a text reminder; a full screen is unreadable in vertical.
• Safe zones: leave room at the top and bottom, where the account name, caption and buttons sit.

How do you fix the first two seconds?

In a long video the speaker takes time to set up the topic. In a Short, the first seconds are when viewers decide to stay or swipe. Three fixes you can combine:

1. Start the clip on the answer, not on the question asked three minutes earlier. 2. Add an on-screen title that states the promise of the clip. 3. Move the conclusion to the start if it is stronger, and let the explanation follow.

Before you publish, you can paste your opening line into Hook Grader, a free agent that scores a hook from 0 to 10 and says why. Use it to compare two or three openings for the same clip, not as a guarantee of views.

Do Shorts need captions?

Yes. Many people watch Shorts without sound, so burned-in captions carry the clip. YouTube Studio adds auto-captions to Shorts made with the Clips and Shorts tool where available; review them, because names and numbers are the words auto-captions get wrong most often. Add short text overlays for key points.

What should you do after publishing?

• Link back: point viewers to the full video. Shorts made in YouTube Studio link the source automatically.
• Space them out: five clips from one video can fill a week instead of one day.
• Compare: after a few days, check which type of moment (answer, number, demo, story, opinion) held viewers best, and pull more of that type from your next long video.
• Plan the next long video with clips in mind: if you script it, write a few standalone lines on purpose. A script agent such as YouTube Script Writer can draft the outline; you still decide what you actually say.

Quick checklist

• One idea per Short
• Starts on the strong line
• 9:16, framed on the speaker or the action
• Captions reviewed
• Link to the full video
• Published on a schedule, not all at once

Sources

• YouTube Help, Video Clips & Shorts in YouTube Studio: https://support.google.com/youtube/answer/15824265
• YouTube Help, Create YouTube Shorts from your videos: https://support.google.com/youtube/answer/12836917
• YouTube Blog, Transitioning your long-form content to YouTube Shorts: https://blog.youtube/creator-and-artist-stories/transitioning-your-long-form-content-to-youtube-shorts/