Use case · Promo cuts
Promo cuts: social clips from the demos you already made
A promo cut turns a video you already made in ViralDub into a short social clip. Pick a finished walkthrough, how-to or voice-over from a paid plan. ViralDub cuts it into clips where its narration lines start, picks the moments that show the most, crops each one around the action for vertical frames and frames them with a hook, titles and a call to action. Your real product stays large on screen.
Key takeaways
- Made from your own finished films, so the product on screen is the real one.
- Clips start where narration lines start; how-to clips are labelled by their step.
- For vertical frames, each clip is cropped to a square around the action, so the interface reads on a phone.
- Product footage is always shown large, never under a dark overlay.
- Included from the Starter plan; free videos can't be cut into promos.
Why cut a promo instead of making a new video
A demo or a how-to already shows your product doing the job. A promo cut reuses those exact moments for the feed, where people decide in a second or two whether to watch. You get a social version of every release without filming again, and the screens match the product people will sign up for.
How it works
- 1
Finish a demo, how-to or voice-over
Any finished film from a paid plan can be the source. Make one with a walkthrough or a how-to video.
- 2
Start a Motion video from it
Choose the film as the source, a shape (9:16, 1:1 or 16:9), a length and a format such as Product demo, Quick tutorial or Before / after.
- 3
The storyboard picks the clips
It chooses clips by what they show and places the action where the frame needs it.
- 4
Download and post
An MP4 with captions burned in word by word, plus SRT and VTT caption files.
| Placement | Shape | Typical length | Format to try |
|---|---|---|---|
| TikTok, Reels, Shorts | 9:16 | 15 to 30 s | Product demo or Quick tutorial |
| LinkedIn and X feeds | 1:1 | 20 to 30 s | Old way vs new way |
| Website, YouTube, release notes | 16:9 | 20 to 45 s | Launch teaser |
Who it's for
Teams that already make demos or tutorials and need a steady stream of short posts for every feature release or launch. If you don't have a finished film yet, a Motion video from your website or a sentence is the faster start.
Frequently asked questions
Which videos can I cut a promo from?
Finished walkthroughs, how-to videos and voice-overs made on a paid plan. Free videos can't be used as a source.
Will the interface be readable on a phone?
Each clip is cropped around the action, using where the agent clicked or typed, so the part that matters fills the vertical frame.
Does the promo have its own voice-over?
By default, yes: Motion writes and voices a new short script with a hook and a call to action, timed to the clips. You can also make it with music only.
How much does a promo cut cost?
It is priced as a Motion video of its length. The exact credits show before you start; the rates are on the pricing page.
Can I make several promos from one film?
Yes. Each promo is its own Motion video, so you can cut different lengths and shapes from the same source.