Reaction / duet

A duet or stitch-style clip: the creator reacting to something else on screen, with their response as the content.

When to use it

For responding to a trend, a competitor, a review or a piece of news quickly. Its value is speed — a reaction is only worth running while the thing being reacted to is still live.

The thing to get right

Only three beats, deliberately. Reactions are short because the source material is doing half the work, and stretching one to a full ad length drains it.

The format at a glance

• Output — a video ad.
• Structure — 3 beats, each one a separately planned shot.
• Family — Creator & UGC video.
• Recipe id — reaction, which is what you name when you ask for it by hand or from an agent.

How Hermoso renders it

You do not write a prompt for this. Hermoso reads your brand first — the product, the logo, the palette, the voice — from your website or a short description, then plans the ad against this format: a beat list, the on-screen copy, and the casting if a person appears. The render happens beat by beat, and every word that ends up on screen is composited afterwards by the app rather than painted by the model, so headlines, captions and the end card come out exactly as written instead of warped and half-invented.

If you have a real product photograph, add it. It is the difference between an ad showing your packaging and an ad showing packaging a model imagined, and it is the single biggest quality lever on any product format here.

Related formats

Formats built around a person on camera — the talking-head, the unboxing, the try-on, the demo. These are the highest-volume paid-social formats on TikTok, Reels and Shorts, and the ones where realism matters more than polish.

• UGC talking-head — a real creator reviewing/recommending the product straight to camera (TikTok/Reels)
• UGC unboxing — a creator excitedly opening/unpacking the product
• UGC tutorial / demo — a creator demonstrating how the product works, step by step
• UGC try-on / haul — a creator receiving, trying on or using the product (fashion/beauty/lifestyle)
• UGC product hero — UGC where the PRODUCT is the sole focal hero — close, tactile, hands-on (little/no creator face)
• This gadget saved me — a creator framing the product as the thing that fixed a specific everyday frustration ("this literally saved me")

The full catalog is on the creative recipes index.

Driving it from an agent

Every format on this site is reachable from an AI agent as well as the web studio. Hermoso ships an MCP server, so Claude, Claude Code, Cursor, Codex and any other MCP client can call plan_ad to draft the creative and render_ad to produce it, name a format as the recipe, and get a finished file back — with the same brand grounding and the same composited-text guarantees. The MCP and CLI overview covers the setup, and the generated tool reference is the complete list.