Turn founder takes, demos and testimonials into video ads

Just ask for it

Things you can type to MirrorCut's agent:

• “Make a 30-second founder ad that opens on why I built this”
• “Cut a 20-second demo ad that shows the result first”
• “Turn this customer call into a 15-second testimonial ad with the best quote up front”
• “Combine the testimonial with the demo footage, testimonial first”

How it works

1. 1

   Upload the recordings you have

   A founder take, a product demo, a customer testimonial or a mix: MP4, MOV, MKV or WebM, recorded on a phone or a camera.

2. 2

   Say which kind of ad

   Founder story, demo or testimonial, how long, and the offer. The agent picks the moments that fit that kind of ad.

3. 3

   Approve and export

   Every cut, caption and graphic is outlined on the timeline. Approve, revert or adjust, then export each format you need.

What MirrorCut does

• Founder-led ads

  You on camera explaining the problem and why you built the fix. The agent opens on your most convincing line and trims the rest so it lands in seconds.

• Product demo ads

  Show the product working. The agent can lead with the result, cut away to the demo while you talk, and put key numbers on screen as animated stats.

• Customer testimonial ads

  A customer's own words are the strongest proof. The agent finds the quotable line, puts it up front with captions, and closes on your offer.

• Mix them in one ad

  A testimonial hook, then the demo, then your offer: ask for the order and the agent builds it from the separate recordings.

• Offer end cards

  Close with a discount and a promo code on an animated end card, from over 200 motion graphics templates.

• You approve every change

  Each AI edit is outlined on the timeline and explained in one line. Accept it, revert it, or keep editing by hand; your edits and the agent's share one undo history.

Guides

• Founder-led video ads: how to record and edit oneHow to make a founder-led video ad: what to say, how to record it without a script, and how to cut it into ads that open on the problem, with formats to try.
• How to make a product demo video adHow to turn a product demo into a video ad: one job, the result first, the waiting cut, proof and one next step. Structure, recording tips and mistakes.
• UGC vs founder-led ads: which should you run?UGC ads or founder-led ads? What each does well, when to use which, what they cost you in time, and how to test both with the same hook and offer.
• How to write a video ad scriptHow to write a video ad script: hook, problem, product, proof and call to action, with a template, word counts by length and tips to sound natural.

Free tools

No sign-up; they run in your browser.

• Video ad script timerPaste a video ad script and see how long it takes to say, whether it fits 6, 15, 30 or 60 seconds, and how many words each length allows.
• Video aspect ratio calculatorEnter your video's size to see its aspect ratio, the largest crop for 9:16, 4:5, 1:1 and 16:9, and the standard HD and 4K output sizes for each.

Questions

What is a founder-led ad?

An ad where the founder talks to camera about the problem and why they built the product. It works because it's personal and specific; it doesn't need actors or a studio.

How do I turn a customer testimonial into an ad?

Upload the recording (a video call is fine), ask for a testimonial ad and how long it should be. MirrorCut finds the most quotable line, opens on it with captions, and ends on your offer.

Can I combine a testimonial with demo footage?

Yes. Upload both and say the order you want; the agent builds the ad from both, in that order.

What does it cost?

Every account starts with 7 days of Creator free (a card is required). After that, Creator is $10, Pro is $30, Studio is $60 a month, and every yearly payment adds 50 bonus AI credits.