Vertical video tools — clipping, captioning, or generating
Sort the job first and the shortlist writes itself.
AI Tools Hub Editorial · published · updated
Three jobs
| Job | Input | Products |
|---|---|---|
| Clipping long-form | An hour-long video or stream | Opus Clip |
| Captions and treatment | Footage you already shot | Submagic, Captions |
| Generating from scratch | A script | Fliki, VEED |
| Including a presenter | A script only | HeyGen, Synthesia |
Clipping requires source material
Webinars, podcasts, stream archives. With no long-form library a clipping tool has nothing to work on. Automatic selection keys on volume changes and topic shifts, which will not always match the moment you consider the highlight, so a human pass over the candidates remains.
Caption accuracy drives watch time
Vertical video is largely watched muted, so caption quality converts directly into retention. Evaluate with footage containing your product names and industry terms — general conversation scores well on every product and tells you nothing.
The ceiling on generated video
Script-to-video output is fine for volume and converges on a look, because the stock library is shared. Acceptable for pure information delivery; insufficient if the point is brand impression.
FAQ
What about Japanese captions?
Usable for general speech, with correction needed on proper nouns and jargon. Measure per-video time including that correction before committing.