Turn a one line idea into a video

What gets decided without you

The story arc, chosen by adapting one of eleven example flows the director is shown, such as launch, problem then solution, stat punch or social proof. The scene roles and their order. Which of 425 layouts fills each role. The copy in every box. The narration script. The voice style and gender, picked from the mood of what you wrote rather than defaulted by video type. And, unless you pin it, the format.

It can look your product up

This is what makes a one line brief work better than it should. When the sentence names a product or a URL the model does not know, it is told to search the web or fetch the page first and build the video on what the product really does, because a confident wrong story about a real product is worse than a generic one. It is also told never to invent a figure, so it either finds a number or leaves numbers out.

The four guesses worth correcting

Audience, because a sentence naming a product rarely names who it is for, and the audience decides the tone. The closing line, because the last thing spoken is the thing you most want controlled. The format, because it will pick one that suits the tone rather than one that suits your placement. And length, because standard is the default and short is usually right for a feed.

Where a short brief actually shines

Exploring. Because generation is a background job rather than a rendering queue you have to babysit, running two or three one line ideas to see which arc the director reaches for is a genuinely useful way to find the shape of a video before committing. Then write the real brief once you know whether it wants to be a problem and solution story or a stat punch.

How it works, in three steps

1. Step 1

   Start with the sentence

   Name the product and what it does. That is enough for a first pass, and a named product may get looked up before the scenes are designed.

2. Step 2

   Read what it assumed

   Look at the scene roles it chose and the closing line. Those two tell you what it thought your video was for.

3. Step 3

   Rewrite the brief, not the video

   If the assumption was wrong, adding the audience and the closing line to the brief fixes more in one go than editing scene by scene.

The full walkthrough with screenshots is in the guide Make a promo video with AI voiceover.

Limits worth knowing

• Each generation spends one credit, including the exploratory ones.
• Web lookup is one search and one page read at most, before the scenes are designed. It is not deep research.
• With no numbers in the brief and none found, no stat or chart scene appears, because inventing a figure is forbidden.
• Roles needing something you did not supply are never offered, so a one line brief with no screenshots gets no showcase or interface demo scenes.

Questions people ask

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