How To Generate Long Form Consistent Videos With AI Prompts

Long-form videos live or die by consistency. Characters must look the same from scene to scene, environments need to match, and the narrative should flow without jarring style shifts. The good news: with the right prompts and a purpose-built AI video agent, you can generate reliable, professional long-form content at scale.

In this guide, you'll learn how to craft prompts for consistency, automate production, and ship longer videos—from product documentaries and branded series to explainers and anime shorts—using the AI Video Agent from Scrptly.

Why Consistency Is the Hardest Part of Long-Form AI Video

Character drift: Faces, outfits, or hairstyles subtly change across scenes.
Environment mismatch: Lighting or layout differences break continuity.
Style wobble: Color palette, frame rate, or shot language shifts during the cut.

Scrptly solves this with a swarm of specialized AI sub-agents—research, screenplay, character design, environment, narration, editing—coordinated to produce a single coherent output. It excels at long-form content by maintaining character and object consistency across scenes, especially when you provide context images.

The Consistency Prompt Framework (CPF)

Use this 7-part framework to write prompts that scale to 5–20 minute videos while staying coherent.

Objective and Audience

What is the video for? Who should care? What outcome do you want (educate, convert, entertain)?

Narrative Structure

Outline acts and beats (e.g., 3-act, problem → solution → proof → CTA). Define approximate durations per segment.

Character Bible

Name primary characters and include identity anchors: age, ethnicity, wardrobe, props, recurring motifs. Add reference images to lock their appearance.

Environment Kit

Describe recurring locations with lighting, time-of-day, and weather. Provide 1–3 context images per key location.

Visual Language

Style (cinematic, anime, documentary), lenses (24mm, 50mm), color palette, camera motion (dolly, handheld), aspect ratio, frame rate.

Audio Direction

Narration tone, music mood, pacing, presence of diegetic sound.

Constraints and Continuity Notes

“Red scarf appears in every scene.” “City skyline at dusk.” “Skincare bottle stays frosted glass with silver cap.”

A Reusable Prompt Template for Long-Form Consistency

Paste the following template into Scrptly’s AI Video Agent and edit the bracketed parts. Upload context images where indicated.

Goal: [Educate/Convert/Entertain] target audience [describe audience] with a [duration] [style] video. Primary KPI: [watch time/conversion/brand recall].



Structure:

- Act 1 (intro, 20%): [setup]

- Act 2 (development, 60%): [key beats]

- Act 3 (resolution + CTA, 20%): [closing]



Characters (consistent across all scenes):

- [Name], [age], [traits], [wardrobe], [props]. Motif: [e.g., red scarf].

- [Name], [role].

Context images: [upload headshots/outfits; refer by filename in prompts].



Environments:

- [Location A] — [lighting], [time-of-day]. Context images: [upload].

- [Location B] — [notes].



Visual Language: [cinematic/anime/docu], [aspect ratio], [color palette], [lens], [camera moves]. Maintain identical character design across scenes.



Audio: [narration tone], [music style], [transitions].



Continuity Notes:

- Maintain [object/wardrobe] across all acts.

- Keep [logo/product] centered in close-ups.

- Reuse [environment] establishing shots for callbacks.



Deliverables: [portrait/landscape], [duration], chapter markers per act, captions embedded, export as final video.

Example 1: 8-Minute Product Mini-Doc (Ecommerce)

Prompt snippet you can paste into Scrptly:

Goal: Drive conversions for our eco-friendly sneakers with an 8-minute mini-documentary targeting urban commuters who care about sustainability and comfort.



Structure:

- Act 1 (1:30): Problem of foot fatigue + throwaway fashion; introduce founder.

- Act 2 (5:00): Materials sourcing, lab testing, design iterations, real commuter day-in-the-life.

- Act 3 (1:30): Testimonials + CTA to visit product page.



Characters: Founder Maya (32, engineer, calm voice, denim jacket, red scarf), Commuter Leo (29, cyclist, messenger bag). Context images: maya_headshot.jpg, leo_side.jpg, shoe_closeup.png.



Environments: Design studio (soft daylight), city street at dusk (neon accents). Maintain dusk color grade across outdoor scenes.



Visual Language: Documentary-cinematic, 16:9, cool teal + warm amber, 35mm–50mm lenses, slow dolly and gimbal.



Audio: Warm female narration; ambient city SFX; minimal piano track.



Continuity Notes: Red scarf appears in all Maya scenes; shoe remains frosted white with charcoal sole; same skyline in all exterior cutaways.



Deliverables: Landscape, 8 minutes, chapter markers per act, burned-in captions.

Example 2: 12-Minute Anime Short With Recurring Characters

Goal: Entertain anime fans with a 12-minute coming-of-age short about a fox spirit learning courage.



Structure: Prologue (1:00), Training (4:00), Trial (5:00), Epilogue (2:00).



Characters: Kitsu (fox spirit, amber eyes, indigo haori, subtle leaf badge), Mentor Sora (silver hair, bamboo staff). Upload context sheets: kitsu_front.png, kitsu_side.png, sora_turnaround.png.



Environments: Misty forest shrine at dawn; mountain pass at golden hour. Keep Kitsu’s eye color and haori consistent.



Visual Language: Hand-painted anime with soft parallax, 21:9, gentle film grain.



Audio: Whispered narration; shakuhachi + strings; foley of leaves and wind.



Continuity: Leaf badge visible in every scene; shrine fox statue recurring motif.



Output: Landscape, 12 minutes.

Step-by-Step: Generating Long-Form Videos in Scrptly

Open the AI Video Agent at Scrptly.com
Paste your prompt using the CPF template above.
Upload context images for characters and environments.
Specify orientation (portrait for social, landscape for YouTube), target length, and style.
Generate. Scrptly’s sub-agents will draft, design, narrate, and edit automatically, producing a final video you can publish immediately.

Tip: If you need iterative refinement, keep the core character and environment descriptions identical between runs and only adjust story beats.

Automate Long-Form Video with N8N

Want hands-free production? Use the Scrptly N8N Integration to trigger video creation from schedules, forms, or webhooks.

Quick setup:

Install the community node: n8n-nodes-scrptly (Settings → Community Nodes → Install New)
Add credentials with your Scrptly API key
Configure parameters: Prompt, Context Images, Approve Up To (token budget)
Optional: Turn off “Wait For Completion” to return immediately with a task ID

More info and source: https://github.com/ybouane/n8n-nodes-scrptly

Use cases:

Batch-generate weekly product reels with consistent hosts
Auto-produce faceless YouTube episodes from research briefs
Create educational series with uniform visual language and pacing

Developer Workflow: Programmatic Video Generation

Scrptly’s Video Development Kit (VDK) makes it simple to create videos with code. Install and authenticate:

npm install scrptly

import Scrptly from 'scrptly';



Scrptly.setApiSettings({

  apiKey: process.env.SCRPTLY_API_KEY,

});



const prompt = `Goal: 10-minute documentary about urban pollinators... [include CPF details + continuity notes]`;



const task = await Scrptly.videoAgent.create({

  prompt,

  contextImages: [

    'https://your-cdn.com/host_headshot.jpg',

    'https://your-cdn.com/park_establishing.png',

  ],

  options: {

    orientation: 'landscape',

    duration: 600,

  }

});



console.log('Task created:', task.id);

You can also connect via MCP or orchestrate agents using the MCP server if you’re integrating with LLM-based tooling, and chain outputs into your pipeline.

Explore the API and VDK from Scrptly’s developer platform.

Consistency Checklist Before You Hit Generate

Names and motifs: Each recurring character has a unique name and motif (scarf, badge, prop).
Reference images: Upload clear, well-lit images for faces, outfits, and key environments.
Environment continuity: Same time-of-day and weather across connected scenes.
Visual language: Lock aspect ratio, color palette, lens, and motion rules.
Audio identity: Same narrator tone and music palette throughout.
Continuity notes: Explicit statements like “keep the red scarf in every scene” or “glass bottle stays frosted.”

Common Pitfalls and Easy Fixes

Vague characters → Add identity anchors and context images.
Scene jumps in style → Define lens, color palette, and camera moves.
Product inconsistency → Upload close-up product shots; add material and color specifics.
Bloated middle act → Add time allocations per act and prune subplots in the prompt.

Why Scrptly Over Generic Editors?

Many tools focus on quick cuts and slideshows. Scrptly is designed for narrative integrity: its coordinated sub-agents handle screenplay, character design, environment building, narration, and editing—with strong character/object consistency and long-form reliability. It’s ideal for:

Ecommerce and agencies producing product films and UGC ads
Entertainment creators building episodic shorts
Educators and communicators crafting explainers and mini-docs
Developers automating content with the API, MCP, or N8N

Your Next Step

Try the AI Video Agent now: Generate with Scrptly
Automate production in workflows: Use the Scrptly node in N8N (docs on GitHub)
Build with code: Explore the Scrptly API and VDK

With the right prompt structure and context images, you can reliably create long-form, consistent videos—ads, explainers, anime, or short films—on demand.