AI Explainer Video Generator: Turn a Script Into a Finished Video
Write what you want to say. Get back scenes, voiceover, captions and music — and change the script later without re-recording anything.
Explainer videos have a particular problem: they go stale. The product changes, the pricing changes, the feature you led with gets renamed — and a video that cost a few thousand pounds to produce quietly becomes wrong, then stays wrong because replacing it costs the same again.
Generating from a script fixes the staleness problem rather than the production problem. When the message changes, you edit the text and regenerate. The video stops being an asset you protect and becomes a document you update.
What it does
Two ways in, one workspace out.
Script to scenes
Paste a script and get scene-by-scene visuals that follow it, with transitions handled.
Voiceover and lip sync
A voice reads the script, or an avatar presents it with matching mouth movement.
Automatic captions
Captions generated from the script and burned in — most explainers are watched muted.
Music and sound
Background music leveled under the voice, plus sound effects where they help.
Consistent visual style
One look across every scene and every video in a series, so a help centre reads as one production.
Regenerate on change
Edit one paragraph and re-run just that section instead of the whole video.
How it works
Four steps, no timeline to learn.
Write the script
Short sentences, one idea per scene. Spoken language is not written language — read it aloud.
Set the look and voice
Choose the visual style, the voice and the language. These carry across the whole video.
Generate the scenes
Scenes are produced against the script. Regenerate individual ones that miss rather than the whole cut.
Finish and export
Captions, music and branding, then export at the resolution you need.
What people make with it
The jobs these tools actually get used for.
Product and feature explainers
The video on the pricing page — and the one you can actually keep current when the pricing changes.
Onboarding and help content
A consistent style across dozens of short how-tos, so the library looks like a library.
Internal process docs
Processes that change often, explained in video form without a production queue.
Sales one-pagers in motion
A short explanation tailored to a prospect, generated per deal.
Localised versions
The same explainer in several languages from one script, with voice and captions regenerated.
The problem with explainers is that they expire
Production cost is the reason outdated videos stay online.
Most companies have an explainer video that is eighteen months out of date. Nobody decided to keep it — replacing it was just expensive enough to keep slipping down the priority list. Staleness is a production-cost problem, not a laziness problem.
When regenerating a section costs a couple of credits, the calculus inverts. The video gets updated in the same pass as the page it sits on, because it is no longer a separate project.
This also makes versioning practical. Instead of one explainer that has to serve every audience, you can produce the sales version, the support version and the onboarding version without tripling the cost.
The discipline that still matters is the script. Generated video inherits the structure of whatever you feed it, so a script that wanders produces a video that wanders. Cut it to short sentences, one idea per scene, and read it aloud before generating anything. Sixty to ninety seconds is usually the right length for a first explainer.
Credits and plans
Generation is metered in credits, shared across every tool.
A five-second video costs 5 credits and one image costs 2. The Free plan gives you 30 credits every month with no credit card, no watermark and commercial use included. Paid plans start at $9 for 400 credits and add faster generation, parallel tasks and higher export resolution.
Frequently asked questions
Do I need to write a full script first?
You need something script-shaped — short sentences, one idea at a time. You can also start from an outline and let the structure fill in as you go.
Can I update the video later?
Yes. Edit the script and regenerate just the affected section, which is the main advantage over a recorded video.
Are captions included?
Yes. Captions are generated from the script and can be burned in — most viewers watch without sound.
Can I use these commercially?
Yes, on every plan including Free. Downloads are watermark-free and cleared for commercial use.
What does a video cost?
A five-second clip costs 5 credits, so a ninety-second explainer runs roughly 90 credits. Paid plans start at $9 for 400 credits.
AI tools
Single-purpose tools that run in the same workspace, on the same credit balance.
More OpenFilmo tools
Other generators and utilities in the same workspace.
More OpenFilmo tools
Other generators and utilities in the same workspace.