How to Write an Explainer Video Script That Actually Converts

The script is where explainer videos succeed or fail. You can have beautiful animation, a professional voiceover, and perfect music — and still produce a video that doesn't move anyone. The script determines whether a viewer understands your product, connects with the problem you're solving, and takes action. Here's how to write one that works.

The Word Count Math

Standard voiceover pace is 130–150 words per minute. This is slower than you think — most people read at 200–250 words per minute, but voiceover needs space to breathe. Use these targets: 60-second video = 130–150 words. 90-second video = 195–225 words. 2-minute video = 260–300 words. Most explainer videos aim for 60–90 seconds. Resist the urge to cram in more — a tight 75-second video almost always outperforms a cluttered 2-minute version.

The Classic Explainer Script Structure

The structure that converts: Problem (15–20% of runtime) → Solution (10–15%) → How It Works (40–50%) → Proof or Social Signal (10–15%) → Call to Action (10%). Open with a problem the viewer recognizes immediately. Introduce your product as the solution in one clear sentence. Walk through 2–3 steps of how it works. Add a line of social proof (customers, results, a recognizable name). End with one specific call to action — not 'learn more,' not 'contact us' — something specific: 'Start your free trial,' 'Get a demo,' 'Download the app.'

Writing the Problem Hook

The first 8 seconds determine whether someone watches the rest. Open with the problem in language your customer would use, not language your marketing team would use. 'Tired of spending hours editing video that nobody watches?' lands better than 'Video production is a time-consuming process for many businesses.' The viewer should hear the first sentence and think 'that's me.' Use second-person ('you,' 'your') throughout — it keeps the viewer in the story.

The Solution Sentence

After the problem, introduce your product in one sentence that contains: the name, what it does, and who it's for. 'Synthesia is an AI video platform that lets you create professional training videos without cameras, studios, or actors.' That's it. Don't elaborate yet — the how-it-works section does that. The solution sentence just names the hero of the story.

How It Works: The 3-Step Rule

Humans can track three things comfortably. Explainer videos that try to explain five features or six steps lose viewers. Pick the three most important steps or features and make them the backbone of the video. Use parallel structure: 'First, you do X. Then, Y happens. Finally, Z.' The rhythm makes the information easier to absorb and remember. If your product genuinely has more than three steps, group them into three phases.

Common Script Mistakes

The most common mistakes: Starting with the company name ('Hi, we're [Company] and we...' — nobody cares yet). Using jargon your customer doesn't use. Cramming in too many features. Weak calls to action ('visit our website'). No proof or credibility signal. Writing for the ear, not the eye — explainer scripts should be read aloud during drafting. If a sentence is hard to say, it will be hard to follow. Read every draft out loud before finalizing.

A Simple Template

Here's a fill-in-the-blank framework: '[Pain point your customer feels every day]? [Name] is [what it does] for [who it's for]. Here's how it works: First, [step 1]. Then, [step 2]. Finally, [step 3]. [Social proof line — customers, results, recognition]. Ready to [benefit]? [Specific CTA].' This structure fits 60–75 seconds and works for almost any B2B or SaaS product. Customize the tone and language to your audience; keep the structure.