This tutorial is an original manually prepared language version. It does not use the article live-translation service.
Quick answer
Long videos already contain introductions, answers, reactions, demonstrations and memorable lines that can become individual Shorts. The difficult part is not making the file vertical; it is choosing moments that work without the full video around them.
Use the Free Online Shorts Cutter and test one short sample with the same settings before processing a complete video.
Why this workflow matters
Creators often look for one perfect duration, voice, export preset or automation button. In practice, the best result comes from a sequence of small decisions. The source must contain a complete idea, the active settings must not conflict, and the finished file must be reviewed in the same conditions as the audience will experience it.
Automation is most useful when it makes the workflow repeatable. It should not remove editorial judgment. A mathematically valid clip can still begin in the middle of a sentence, and a technically valid voice file can still pronounce a name incorrectly. The steps below keep speed and quality in the same process.
Recommended starting settings
| Setting | Practical starting point |
|---|---|
| Source range | Start at the first useful section and end before unrelated material. |
| Clip duration | 30–60 seconds is a practical starting test; YouTube can classify square or vertical videos up to three minutes as Shorts. |
| Clip count | Choose a small manual batch for highlights or automatic sequential clips for full coverage. |
| Ratio | 9:16 for a vertical mobile-first result. |
| Subtitles | Enable when speech is important, then proofread names and timing. |
These are starting points rather than universal rules. Content type, language, audience, source quality and platform changes can require a different choice.
Step-by-step workflow
Step 1: Choose a section that has one clear idea, answer or emotional beat
Choose a section that has one clear idea, answer or emotional beat.
Step 2: Set the source range so unrelated material is not processed
Set the source range so unrelated material is not processed.
Step 3: Use normal Clip Duration when you want flexible editing, or Exact Duration when every output must match one length
Use normal Clip Duration when you want flexible editing, or Exact Duration when every output must match one length.
Step 4: Turn Manual Number of Clips on for a planned batch, or off to split the selected range sequentially
Turn Manual Number of Clips on for a planned batch, or off to split the selected range sequentially.
Step 5: Use Smart Crop for a vertical frame, then check faces, captions and important objects
Use Smart Crop for a vertical frame, then check faces, captions and important objects.
Step 6: Export a short test before processing the entire long video
Export a short test before processing the entire long video.
How the BestAI tool handles it
BestAI's free Shorts Cutter keeps the length logic explicit. Normal mode uses the main Clip Duration with minimum and maximum length rules. Exact Duration mode takes authority and temporarily disables the conflicting controls. Manual clip count requests a fixed batch, while automatic count splits the selected range into full sequential clips. The live Clip Plan should be checked before processing.
The important design principle is that one setting should control one decision. When a mode overrides another setting, the interface disables the conflicting control and the backend follows the same rule. This prevents a page from showing one plan while processing another.
Quality-control checklist
- Watch or listen from the beginning without reading the source script.
- Check the first two seconds for clarity and unnecessary delay.
- Verify names, numbers, mixed-language words and technical terms.
- Review the result on headphones and an ordinary phone speaker or phone screen.
- Confirm that the final title and description accurately represent the content.
- Keep the original source and a clean master so the project can be revised later.
Common mistakes to avoid
- Cutting a random equal-length section without checking whether it has a complete idea.
- Putting the main speaker outside the vertical crop.
- Starting with a long greeting instead of the result, question or conflict.
- Publishing automatic captions without reviewing names or mixed-language words.
- Creating twenty near-identical clips when five strong clips would be more useful.
A repeatable publishing workflow
Create a small test first. Name the settings or save them in the browser when the tool supports that option. Produce a limited batch, review the files, and change only one important variable at a time. This makes it possible to understand whether duration, crop, voice, speed, subtitles or source selection caused the difference.
For a series, document the chosen ratio, duration range, voice, speed, subtitle style and export format. Consistency reduces production time, but it should not force every topic into an unsuitable length or tone. The viewer's understanding remains the final test.
Frequently asked questions
Can a YouTube Short be longer than 60 seconds?
Yes. YouTube currently classifies square or vertical videos up to three minutes as Shorts when they meet its upload rules.
Should I use every part of the long video?
No. Highlights should stand on their own. Sequential splitting is useful for courses or stories, while interviews and reviews often need selective moments.
What should the first second contain?
A clear visual, result, question, reaction or line that tells the viewer why the clip matters.
Final takeaway
The strongest workflow is not the one with the most automation. It is the one that makes the creative decision clear, applies the correct setting, produces a test quickly and leaves enough control for a human review. Use the tool to remove repetitive work, then spend the saved time improving the opening, accuracy and final experience.