How to generate short clips from a long video
Upload a livestream, class, or interview: the AI finds the best moments, scores each one, and delivers vertical clips, ready for Reels and Shorts.
2 min readBasicUpdated on November 12, 2026
Where to find it in Cognizy
Video lesson coming soon. For now, follow the steps below.
A long video holds several short videos. You upload the recording and the AI transcribes the speech, finds the 15 to 90 second clips that complete an idea, gives each one a score from 0 to 100, and frames it vertically, following the speaker's face. You choose the best ones and open them in the editor.
Where to find it in Cognizy
Before you start
- Have the video in MP4, MOV, or WebM, 1 minute to 2 hours long, up to 10 GB, with speech.
- The analysis uses credits per minute of video; the screen shows the estimate before you upload. Assembling each clip is billed separately.
- The analysis takes a few minutes and continues even if you leave the screen.
Step by step
- Step 1:
In , click New video.
- Step 2:
In the window, choose Long video.
- Step 3:
In Your long video, choose the file. Cognizy shows the size, duration, and credit estimate before you confirm the upload.
- Step 4:
After uploading, the analysis goes through four stages: Audio, Transcription, Moments and scores and Framing. You can leave the screen: the clips appear when they're ready.
- Step 5:
Each clip comes with an estimated score, from 0 to 100. Use Adjust to change the start and end, and Framing to switch between following the face, split screen, and blurred background. Select the ones you want (or Select all) and click Open in editor (3) to finish them one by one, or Assemble all (3) to generate them all at once.
How to know it worked
The selected clips appear in the video library, under the Long video clips filter, linked to the original video. Once assembled, they're ready to publish or schedule.
If something goes wrong
No clip found appears.
The AI couldn't find 15 to 90 second clips that complete an idea. Videos without clear speech or with a lot of crosstalk usually cause this. Try another video, or use New clip to mark the section by hand.
The analysis failed partway through.
Click Try again: the analysis continues from the stage where it stopped, without charging again.
The clip starts or ends in the middle of a sentence.
Click Adjust and move the start or end phrase by phrase. The score and thumbnail update right after.
I want a section the AI didn't catch.
Use New clip: search for the speech by text and create the clip there. It doesn't use AI and doesn't use credits.
Next step
Open a clip in the editor to adjust the caption and final call to action before publishing.
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