The prompt is the whole interface to the Video Agent. The agent makes every decision you leave open, so the more direction you give, the closer the first cut lands to what you pictured. A good prompt reads like a creative brief: what the video is, how long it runs, and what it should look like.
This page builds one real prompt step by step — and ends with the video it produced.
Put the duration in the prompt
The agent paces scenes to the length you ask for. Lead with it: “Make a 30-second portrait real estate market update…” produces a video paced to 30 seconds, scene by scene.Add a style paragraph
Describe the video you want, then add a short style paragraph: what the graphics should look like, the colors, the energy, how things move. The agent reads it and makes every visual decision through it — anything you leave out, it decides for you.Example prompt
style_id — see Styles & References.
Paste your script for exact control
If you already have a script, paste the whole thing in and the agent follows it scene by scene, building the visuals around your exact words. Combine it with the style paragraph and a duration for the tightest brief:Example prompt with script
The output
This is the video that prompt produced — one prompt, one pass:Generated by Video Agent from the prompt above.
More levers
- Attach reference files. Pass slides, images, or documents in the
filesarray — the agent folds them into the video as visual context or content sources. See Upload Assets. - Pin a specific avatar or voice with
avatar_id(see Avatars) andvoice_id(see Browse Voices) for consistency, or omit them to let the agent choose. - Apply your brand once with
brand_kit_idfromGET /v3/brand-kits— colors, fonts, and logo ship on-brand by default on every video after. - Set
orientationwhen you know the target platform ("portrait"for mobile/social,"landscape"for presentations). - Review the plan before it builds. With
"mode": "chat", the agent comes back with a scene-by-scene plan you can push back on before production starts. See Interactive Sessions.

