Long-Form Generator

Long-Form AI Video Generator for Complete 16:9 Stories

Turn an authorized source script into an 11–15 minute horizontal AI video with 20–36 generated scenes, narration, and optional timed captions.

Verified output status

Current long-form evidence boundary

The live product and API expose the long-form workflow and its delivery contract. The public example library currently contains verified short-form renders, not an 11–15 minute long-form case study, so this page does not present those shorts as long-form proof.

Inspect the long-form API contract

Why Long-Form Needs Structure

Long-form video cannot be created by stretching a short script. The source needs a defensible thesis, enough evidence or story development for multiple sections, clear rights, and visual beats that keep advancing the idea. A vague or padded script produces repetitive narration and generic scenes even when the render is technically complete.

How VidiPrompt Builds the Video

VidiPrompt turns a prepared source script into one horizontal 16:9 video designed to run 11–15 minutes. The background workflow develops long-form narration, plans 20–36 visual beats, generates fresh scenes, creates the selected voiceover, optionally burns in timed captions, and assembles the final MP4. You can leave the progress screen while the job continues and return from your library.

What You Can Improve

  • Produce one horizontal 16:9 video with a target runtime of 11–15 minutes
  • Start from 3,000–60,000 characters of source material you have the right to use
  • Generate 20–36 fresh visual scenes around the narration and selected visual direction
  • Choose a supported language and voice, with optional captions burned into the final MP4

Workflow

  1. Step 1

    Prepare a structured source script, confirm your rights, and choose visual direction, language, voice, and caption settings

  2. Step 2

    Queue the project while VidiPrompt develops the narration, plans visual beats, generates scenes, and renders in the background

  3. Step 3

    Return to the generation workspace or library, review the completed horizontal video, and download the MP4

Inputs to prepare

  • A 3,000–60,000 character source script with a clear beginning, development, and conclusion
  • Source facts, names, quotations, pronunciations, and qualifications that must remain accurate
  • Rights to use the supplied material plus any disclosure or attribution requirements
  • Visual direction, supported output language, narration voice, and optional caption treatment

Visual direction

Long-form scenes should change scale and purpose as the story advances: establishing geography, physical mechanisms, people performing real tasks, and detail shots that explain the current narration beat. Reuse continuity anchors for recurring locations and materials, but avoid repeating the same composition or inventing unsupported evidence.

Working example

Topic prompt

Use an authorized 1,900-word educational script explaining how undersea fiber-optic cables are laid, powered, monitored, and repaired. Preserve the distinction between repeaters and branching units, qualify that system designs vary, and structure the story from landing station to repair ship.

Possible opening line

Most of an international message travels through a cable resting in darkness on the ocean floor.

Accuracy and disclosure review

  • - Confirm you have the right to use the source script and any protected facts, quotations, or story material
  • - Review narration, captions, generated scenes, and pronunciations before treating the output as publication-ready
  • - Disclose generated or illustrative media when viewers could reasonably mistake it for documentary evidence

Current limitations

  • - The source is condensed or developed to the fixed 11–15 minute delivery range; it is not a frame-accurate timeline editor
  • - Only one long-form job can be outstanding at a time, and availability depends on the eligible plan allowance
  • - VidiPrompt does not fact-check the source, guarantee scene continuity, publish the video, or guarantee audience performance

Frequently Asked Questions

How long is a VidiPrompt long-form video?

The current delivery contract targets 11–15 minutes in horizontal 16:9. Source scripts outside the supported length are rejected, and longer accepted scripts may be condensed to fit that range.

What source material do I need?

Provide 3,000–60,000 characters of material you are authorized to use. A structured script with verified facts, clear sections, and concrete visual opportunities gives the workflow a stronger foundation than a vague topic alone.

Can I close the generation screen?

Yes. The job runs in the background after it is queued. You can return to its generation workspace or find the completed result in your library.

Does VidiPrompt guarantee a YouTube result?

No. VidiPrompt creates the media file. It does not guarantee publishing approval, indexing, recommendations, watch time, monetization, or channel growth.

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