How to write an AI story video prompt (free templates + examples)

Everything in a BuildStory AI video starts from one box: the prompt. The style, voice, music and length are settings you pick. The story itself (who it's about, how it opens, where it turns, how it ends) comes from what you type there. This guide shows how to write a prompt that gets you a better story, with two free templates you can copy.

What happens to your prompt

When you generate, BuildStory hands your prompt to Claude, which writes the script: a hook in the first seconds, a setup, rising tension, a climax and a resolution, split into scenes. The narration is written to fit the length you chose, and every scene gets its own illustration. The full pipeline is in how BuildStory AI turns one line into a finished video.

So the prompt is a brief, not a script. The more specific it is about the things only you can decide (the character, the hook, the twist, the ending), the less the AI has to invent, and the more the narration sounds like your story.

One sentence works. A brief works better.

You can absolutely type one line. Compare three versions of the same idea:

• A topic: "A scary story about a security guard." Every guard story ever told fits that, so you get the average of all of them.
• A premise: "A night guard notices the lobby camera feed is running four seconds behind real life." Now there's something strange to build on.
• A brief: the premise, plus who the guard is, where it happens, how it escalates, what the twist is and how it ends.

Story type: scary story
Audience: adults who love short horror on TikTok and YouTube Shorts
Main character: Dale, 58, a night-shift security guard who has worked the same office tower for eleven years without a single incident
Setting: an empty 30-floor office tower downtown, 3 a.m., the middle of winter
Hook: The lobby camera feed is running four seconds behind real life. Dale waves at the camera, and his image waves back late.
Conflict: All night the delay keeps shrinking: three seconds, two, one. Dale cannot work out what it is counting down to, and he cannot leave his post.
Turning point: The delay reaches zero and keeps going. On the monitor, Dale stands up and turns around. In the booth, Dale has not moved.
Ending: Dale slowly turns to look behind him. Cut to the monitor: the guard booth is empty. Leave it unexplained.
Tone: slow, quiet, creeping dread. No gore.
Narrator: third person, calm, close to Dale's thoughts
Must include: the words "four seconds"

The premise is already a good prompt. The brief is what gets you a hook in the first line, a turn the viewer didn't see coming and an ending that lands, because you decided them. Short on time? Type the one-line premise and press Enhance with AI in the create form: it expands a short idea into a fuller pitch.

Six things that make a strong brief

Be specific

Names, ages, places, dates and numbers give the narration something to say. "Dale, 58, eleven years on the night shift" carries a whole life; "a guard" carries nothing. "A lighthouse keeper in 1890s Maine" beats "someone by the sea" every time.

One main character, one conflict

A one-minute video has room for one person (or one subject) and one problem. Subplots and side characters get squeezed into a sentence each and make the story feel rushed. If your idea has three heroes, pick the one whose problem drives everything.

Open on the hook

The first sentence decides whether people keep watching, especially on Shorts and TikTok. Give the AI the strange, surprising or emotional moment to open on, not the backstory. "The camera feed is four seconds behind" is a hook; "Dale has worked here for eleven years" is not.

Plan the turn

A twist, a reveal, or the moment everything changes is what makes a video feel like a story instead of a list of events. Decide it yourself: it's the part the AI is least likely to guess.

Choose the ending

Say how it resolves and the feeling you want to leave: relief, chills, wonder, an open question. Without one, stories tend to trail off. "Leave it unexplained" is a perfectly good ending, as long as you ask for it.

For real events, give the facts

For history, news or science, list the dates, names and numbers you want stated. The AI fills any gap you leave on its own and can get facts wrong, so the more you give it, the less it invents. Always watch the result before you post it.

What to leave out of the brief

Some things belong in the settings, not in the brief:

• Language. Write your brief in any language; the narration follows the Language setting.
• Length. It comes from the duration you pick. BuildStory writes as much narration as that length needs.
• The look. Pick a style, or leave it on Auto and the AI designs a look for your story. Words like "4K" or "cinematic shot" don't add anything to the story; spend those words on what happens.
• Voice and mood. Set them with the Voice and Mood pickers.
• The script itself. A full narration pasted in gets rewritten to fit the length and the scenes. Describe the story and let BuildStory write the words. If one line matters, ask for it under "Must include".

The Story template

For fiction: scary stories, bedtime stories, sci-fi, fables, drama. Copy it, then fill it in yourself or let an AI chat do it (see below).

Fill in the template below for a short video story. My idea: [your idea]

It's for BuildStory AI, which turns it into a narrated, illustrated video and writes the narration itself, so I need a sharp brief, not a script.

Story type: [scary story, bedtime story, sci-fi, fable, drama, comedy…]
Audience: [who it is for: kids 4–7, teens, adults who love horror…]
Main character: [name, age, and one detail that makes them memorable]
Setting: [a specific place and time: "a lighthouse in 1890s Maine", not "by the sea"]
Hook: [the strange, surprising or emotional moment the video opens on]
Conflict: [what they want, and what stands in the way]
Turning point: [the twist or reveal that changes everything]
Ending: [how it resolves, and the feeling the viewer is left with]
Tone: [eerie and slow, warm and gentle, punchy and dramatic…]
Narrator: [third-person storyteller, first person ("I"), or a character telling it]
Must include: [names, lines or details to keep — or leave blank]

Rules:
- Be concrete: names, ages, places, numbers. "A lighthouse keeper in 1890s Maine" beats "someone by the sea".
- One main character and one clear conflict. A short video can't carry subplots.
- The hook must work as the very first sentence of the video: strange, surprising or emotional.
- The turning point should change how we see everything before it.
- Fill in every line, keep it under 250 words, and reply with the filled-in template only.
- Don't write the narration, a scene list, camera directions, music or an art style.

Need premises to start from? The horror, bedtime and sci-fi pages each have ready-made ones.

The Explainer template (for real events)

An explainer answers one question about something real, step by step, instead of telling an invented story: how the Berlin Wall opened, why a ship was found sailing with no one on board, what led up to an election. It swaps the main character for a topic and an angle, and the plot for key points in the order the video should tell them.

Fill in the template below for a short explainer video on a real topic. My idea: [your idea]

It's for BuildStory AI, which turns it into a narrated, illustrated video and writes the narration itself, so I need a sharp brief, not a script.

Topic: [the event, person, place or idea]
Angle: [the one question this video answers]
Audience: [who it is for, and what they already know]
Hook: [the most surprising fact or moment, to open the video]
Key points: [3–5 facts or moments, numbered, in the order the video should tell them]
Key people & places: [who and where, with names]
Turning point: [the moment everything changed]
Ending: [what it means today, or the question it leaves open]
Tone: [neutral and factual, gripping, respectful…]
Narrator: [calm documentary voice, investigative, storyteller…]
Must include: [dates, numbers or quotes you want stated — or leave blank]

Rules:
- Be concrete: names, places, dates, numbers.
- One clear question, answered step by step in the key points.
- The hook must work as the very first sentence of the video: the most surprising fact.
- Stay factual and neutral. Only state facts you are confident are true, and keep facts and theories clearly apart.
- Fill in every line, keep it under 250 words, and reply with the filled-in template only.
- Don't write the narration, a scene list, camera directions, music or an art style.

Here's one filled in:

Topic: the fall of the Berlin Wall, 9 November 1989
Angle: How did one confused answer at a press conference open the Berlin Wall overnight?
Audience: curious adults and teens who know the Wall fell, but not how
Hook: The Berlin Wall did not open because of a battle or a treaty. It opened because a spokesman misread a note on live TV.
Key points:
1. By 1989, thousands of East Germans were fleeing west through Hungary, and the government was under huge pressure.
2. Officials drafted looser travel rules, meant to start the next day through an orderly visa process.
3. Spokesman Günter Schabowski was handed the note just before his evening press conference, without being told when the rules began.
4. Asked when they took effect, he said that, as far as he knew, it was immediately.
5. Within hours, crowds gathered at the border crossings, demanding to be let through.
Key people & places: Günter Schabowski; Harald Jäger, the officer in charge at the Bornholmer Straße crossing; East and West Berlin
Turning point: Around 11:30 p.m., with no orders and a crowd he could no longer hold back, Jäger opened the gate.
Ending: Less than a year later, Germany was reunified. A wall that had stood for 28 years was opened by one unscripted sentence.
Tone: gripping but factual and neutral, no exaggeration
Narrator: calm documentary voice
Must include: 9 November 1989; "as far as I know… immediately"

For sensitive or ongoing events, ask for a neutral, factual tone in the brief, and keep facts and theories clearly apart.

Let your AI chat write the brief

Filling in a template takes a few minutes, but you don't have to do it by hand:

1. Copy one of the templates above. The Copy button includes the instructions the AI needs.
2. Paste it into ChatGPT, Claude or Gemini and replace "[your idea]" with yours. One sentence is enough.
3. Read what comes back, facts especially, then paste the brief into BuildStory's story box.

Ask for three versions and keep the one with the best hook. The same templates are in BuildStory's create form under Writing guide, next to six ready-made examples.

Common mistakes

• A topic instead of a premise. "Space exploration" is a subject; "a relay station receives a distress call in its operator's own voice, dated nine years from now" is a story.
• Too many characters. One hero, one problem.
• No ending. "And then strange things start happening…" leaves the AI to guess.
• A pasted script. It gets rewritten to fit the length anyway; a brief gives you more control.
• Style words instead of story words. "Epic, dark, 8K" says nothing about what happens.

The short version

One sentence gets you a video. A brief, with a specific character, a hook, a turn and an ending, gets you a story. Copy a template, let your AI chat fill it in, check the facts, and generate.