Script Review: Edit Your Demo Narration After It Renders

Until today, DemoPolish worked in one shot: you uploaded a recording, and a minute later you got back a finished demo with a clean voiceover. Fast — but with one catch. If the rewritten narration said "Acme" where you meant "Acme Cloud," or leaned a touch more formal than your brand, your only option was to run the whole thing again and hope.

Not anymore. Script Review is now live for every DemoPolish account. Before a single second of voiceover is rendered, you get to read the rewritten script, change anything you want, and approve it. This post walks through what changed and how to use it.

Update, September 24, 2026: the pre-render checkpoint described below has since moved. DemoPolish now renders straight to a finished video, and script editing happens in the editor on that finished video instead of before it exists: you watch the result first, then fix only the line that's off. Read the editor launch post for how it works today; the rest of this post is kept as a record of how Script Review originally shipped.

The old flow: upload, hope, repeat

The original pipeline was deliberately simple. Upload → transcribe your narration → rewrite it into a tighter script → generate the voiceover → render the video. One button, one result.

That simplicity is great when the rewrite nails it, which it usually does. But narration is full of details only you know: the exact spelling of a feature, how you pronounce your company name, whether "click here" should be "head to your dashboard." When one of those slipped through, fixing it meant re-rendering from scratch — and burning a video credit to do it.

Introducing Script Review

Script Review splits polishing into two phases with a checkpoint in between.

1. Phase one — the script. You upload your recording as usual. DemoPolish transcribes your rough narration and rewrites it into a clean, tightened script. Then, instead of pushing straight to render, it pauses at a new Awaiting review step and hands the script to you.
2. Phase two — the render. Once you've read the script and made any edits, you approve it. Only then does DemoPolish generate the voiceover and render the final video — built from your approved words, not a first guess.

Nothing about the speed you're used to changes; you're just adding a quick gate where you have the most leverage — before the words are locked into audio.

What you can do in the review step

The review screen is built for one job: get the script right in under a minute. Here's what's on it.

Edit the script segment by segment

The rewritten narration is broken into segments that line up with your demo. Edit any of them directly — fix a name, swap a word, tighten a clause. Changed your mind? Each segment has a one-click reset that restores the AI's version, so experimenting costs you nothing.

Keep an eye on pacing with live word count

A running word count tracks your edits against the target length for the video. Add three sentences and you'll see it immediately — which keeps the final narration from outrunning what's actually happening on screen. (If you want the theory behind tight scripting, see our demo video script guide.)

Set the voice and music — with free previews

Narrator voice and background music are right there in the review step, both with free previews. Audition a voice, try a music bed, hear them before you commit. No rendering, no waiting, no credit spent to find out whether a voice fits your brand.

Stay oriented with the video rail

Your recording sits in a sticky preview beside the script, so you can scrub back to a moment while you're editing the line that narrates it. The script and the screen stay in sync as you work.

Approve, and we render the final video

When the script reads the way you want, hit approve. DemoPolish generates the voiceover from your edited script and renders the finished demo — same quality, same speed as before, now with words you've signed off on. Download it and ship it.

Fix a finished video anytime

Already have a completed video and spotted something you'd change? Re-voice just the line that's off, or use Start over to regenerate the whole script from your original recording. Either way, it doesn't count against your monthly video allowance, so refining a demo until it's right never costs you a new credit.

It's the natural companion to script editing generally: most people are happy with the first pass, and clean up anything else afterward without penalty.

Why this matters

The whole point of DemoPolish is to turn a rough recording into a shippable demo without a video editor or a re-record marathon. Script Review keeps that speed but hands you the one piece of control that actually moves the needle: the words. You get editorial say over your narration — correct names, the right tone, the right pacing — without giving up the upload-and-go workflow.

Fast when you want it, precise when you need it.

How to try Script Review

Upload a recording the way you normally would. You'll land on a finished, narrated video first: see the current editor for how editing works now. Line-by-line script control is still there; it comes after you've watched the video, not before.

Try it for $3: start a demo. New to DemoPolish? Here's how AI voiceover works end to end.

FAQ

What is Script Review in DemoPolish?

Script Review is DemoPolish's script-editing step. It originally paused before rendering; it's now part of the editor on your finished video, so you watch the polished result first and then edit or re-voice any line, without losing the video you already have.

Can I edit the AI-generated voiceover script?

Yes. In the editor you can edit any line of the script, fixing a product name, changing a word, or tightening a sentence, one line at a time. A fit indicator shows how your edit affects the line's timing, and you can reset any line back to its original text with one click.

Does re-polishing a video use my monthly quota?

No. Editing lines, re-voicing them, or starting over on an already-finished video never consumes your monthly video allowance, so refining a demo never costs you a new credit.

Can I change the narrator voice or background music during review?

Yes. The editor includes editable narrator and music settings with free previews, so you can hear a voice or music track before you commit, and your existing video stays playable and downloadable while the new one is made.