How to make UGC ads with AI, step by step

What makes an ad "UGC"?

A UGC (user-generated content) ad looks like something a customer filmed on their phone: one person, a real place — a kitchen, a car, a driveway — talking straight to the camera about a problem and what fixed it. It is built to feel like a post, not a commercial. Making it with AI means the script, the presenter, the voice and the footage are generated instead of filmed.

A UGC ad usually has four beats, whatever tool made it:

1. Hook (first seconds): a line or image that makes the right person stop scrolling.
2. Problem: the specific frustration, in the buyer's words.
3. Reason to believe: one concrete detail — a number, a demonstration, a before-and-after.
4. Call to action: what to do next, with your name and web address on screen.

The six steps above turn that shape into an ad you can test. Below is each step in more detail, with VideoPronto as the worked example.

Step 1: How do I choose what the ad is about?

Pick one offer, one promise and one buyer before you open any tool. "Pre-purchase car inspection for $299, for people buying a used car from a private seller in Miami" is an ad. "We do inspections, detailing and financing for everyone" is a brochure. The narrower the brief, the sharper the hook can be.

If you are not sure which offer to lead with, look at what your competitors keep paying to run. Ads that stay active for months are a signal worth studying — our guide to researching competitor ads in the Meta Ad Library shows how.

Step 2: How do I write hooks worth testing?

Write three to five opening lines that are genuinely different, not five rewordings of the same sentence. The hook is the variable you are testing, so vary the angle:

• Confession: a small admission — "I almost skipped the inspection."
• Warning: "Don't buy a used car in Florida until you check this."
• Specific number: "$949. That's what day four cost me."
• Question: "Would you know if the seller cleared the check-engine codes?"
• Overheard conversation: two people discussing the problem, podcast-style.

Our video ad hooks guide has more styles with ready-to-use prompts.

Step 3: Who should be in the ad?

Decide the format, the presenter and the language together, because they change how the hook lands. On VideoPronto the choices are:

• Format: one person to camera (UGC), several different people with one line each (Real Voices), a podcast clip, a Pixar-style or claymation animation, or a no-face product showcase.
• Presenter: cast by VideoPronto, one of the ready-made Promoters, or your own consent-verified digital double.
• Language: English with 15+ accents (Southern US, New York, Midwest, California, Texas, British, Australian, Irish and more) or Spanish by variety — Miami Cuban, Mexican, Colombian, Puerto Rican, Argentinian, Tejano or Spain — written in Spanish, not translated.
• Feeling: high-energy negative, high-energy positive, quiet negative or calm positive. The hook, pacing, delivery and music follow it.

Think about the presenter's claim, too. A generated person saying "I used this and it saved me" is presenting as a customer who does not exist. Framing that is clearly a dramatization, a spokesperson for the brand, or your own digital double avoids that problem — more on this in step 5.

Step 4: How do I generate the script and the video?

Give the tool the business and the hook, and let it do the production. On VideoPronto you either paste your website — it reads your logo, colors, voice and offers into a Brand Kit and proposes three to six ad concepts — or you type one sentence per hook. For example:

Make me a UGC ad for my greens powder where a girl admits she quit every healthy habit, then blames her old gritty powder instead of herself.

That single line is the brief behind the greens-powder sample on this page. VideoPronto writes the script, casts the presenter, renders the scenes, adds captions and your branded end card, and returns a vertical MP4 — most in under seven minutes, nearly all in under ten. At about $3.30 a video (pricing), making one finished ad per hook is the normal way to work, not a luxury. The full math is in what an AI UGC ad costs.

The second sample is a real client ad: Inspect First, a pre-purchase car inspection company in South Florida, runs VideoPronto UGC ads like it as Meta lead ads, in English and in Cuban Spanish from the same Brand Kit.

Step 5: What should I check before the ad runs?

Watch every version with the sound on, as a skeptical customer would, and run this checklist:

• Claims: every number, result and promise is one you can back up. An AI script can phrase things more boldly than your evidence allows; cut or soften anything you could not defend.
• Who is speaking: an invented person is not presented as a real customer describing a real experience. Use a spokesperson framing, a real customer's story retold with their permission and labeled as a dramatization, or your own digital double.
• Platform labels: TikTok requires AI-generated ads to carry its AI label or your own clear disclaimer, and New York requires ads to disclose synthetic performers. See do you have to disclose AI in ads?
• Captions and names: spelling of your brand, prices and web address, on screen and spoken.
• The first second: does the opening frame still make sense with the sound off? Assume some viewers scroll muted.

Step 6: How do I test the versions and pick a winner?

Run the variants at the same time, to the same audience, with the same budget each, and judge them on the result you actually want — cost per lead, cost per booked call, cost per sale — not on views or likes. Give each version enough spend to produce a handful of results before deciding; a one-day, few-dollar test mostly measures luck.

1. Launch three to five versions that differ only in the hook.
2. Let them run until each has had a fair share of the budget.
3. Turn off the versions with the highest cost per result.
4. Write new hooks in the style of the winner — same angle, new words — and test them against it.

That loop is where cheap production pays off: the winner of round one becomes the control for round two.

What are the most common mistakes?

• Testing five scripts that all open the same way. Change the hook, not the adjectives.
• Putting the logo in the first shot. It signals "ad" before the hook has a chance; save the brand for the end card.
• Selling three things at once. One ad, one offer.
• Passing off an invented person as a real customer. It is the fastest way to turn a cheap ad into a legal problem.
• Judging on likes. Measure the business result.