How to Make an Explainer Video: Script, Visuals, Voiceover

A good explainer video makes a complicated idea feel obvious in about a minute. Most explainers that fail don't fail on animation quality. They fail because the script tries to explain four things at once, or because the voiceover runs longer than the visuals can keep up with.

The short answer: to make an explainer video, pick one audience and one message, write a 5-beat script (problem, solution, how it works, proof, call to action), budget about 150 spoken words per minute, storyboard it as a two-column narration/visual table, then record or generate the voiceover and keep music well under it. For most product and landing-page explainers, aim for 60 to 90 seconds.

Three numbers do most of the planning work here:

The word budgets come from the average US conversational rate of about 150 words per minute, as measured by the National Center for Voice and Speech. The rest of this guide walks through each step, with the checks we use before a script ever reaches a voiceover.

What Is an Explainer Video?

An explainer video is a short video that explains what something is, how it works, and why it matters. It can cover a product, a feature, a process, or an idea.

It's different from a product demo. A demo proves the product works by showing the real interface click by click. An explainer is built for understanding first, and the interface is only one possible visual. (See product demo vs. explainer video for a side-by-side comparison.)

If your viewer doesn't yet know why the problem matters, you need an explainer. If they already know and want to see the product, you need a demo.

Step 1: Write the One-Sentence Brief

Before writing a script, finish this sentence: "After watching, [audience] will understand [one idea] and will [one action]."

For example: "After watching, finance leads will understand how automated reconciliation works and will book a demo."

If your goal doesn't fit in one sentence, you're explaining too much. Split it into two videos. The one-sentence brief is the filter for every later decision, so write it down before anything else.

Step 2: Write the Explainer Video Script

The script decides whether people finish the video. Great visuals can't rescue a confusing script. Use this five-beat structure for a 90-second explainer:

1. Problem (0-10s): open with the viewer's pain in their own words. "Month-end close takes your team two weeks."
2. Solution (10-20s): introduce your product or idea in one sentence.
3. How it works (20-60s): three steps at most, each one concrete.
4. Proof (60-75s): one real result, customer name, or number you can source.
5. Call to action (75-90s): one next step, not three.

For a 60-second version, shrink "how it works" to about 25 seconds and keep the other beats.

Script writing rules

• Write for the ear. Short sentences, everyday words, active voice.
• Count the words. 225 words for 90 seconds is a ceiling, not a target. Leave room for pauses where the visuals land.
• Benefits before features. "Close your books in two days" beats "automated ledger matching."
• Only use proof you can back up. If you don't have a sourced number yet, use a customer quote or a named workflow instead.
• Read it aloud with a timer. If you stumble or run over, your voiceover will too.

A script that reads cleanly aloud inside its word budget is ready for visuals. One that doesn't will get worse, not better, once production starts.

Step 3: Choose a Visual Style That Fits the Idea

The right visual style depends on what you're explaining:

• Motion graphics and kinetic typography: ideal for SaaS, data, and abstract ideas. See our guide to motion graphics vs. animation.
• Product UI animation: best when the explanation involves your actual software. Animated screens show the workflow without a shaky screen recording.
• 2D character animation: good for consumer stories, but slower and more expensive to produce.
• Diagram and data explainers: best for research, reports, and technical concepts.

Plan for silent viewing whichever style you choose. In a 2019 Verizon Media and Publicis Media survey of 5,616 US adults, 69% said they watch video with the sound off in public. Bold on-screen text and clear caption styles keep the message working on mute.

Pick the style that makes your one idea easiest to see, not the one that looks most impressive in a portfolio.

Step 4: Storyboard It as a Two-Column Table

You don't need drawings. A storyboard can be a table with two columns, "Narration" and "Visual," and one row per sentence:

Two rules keep this table honest:

• Change the visual every 3 to 5 seconds. A 90-second explainer usually needs 18 to 30 shots.
• Every visual must show the line being spoken. If a row's visual could sit next to any sentence, it's decoration. Replace it.

When the table is done, you have a full production plan that anyone on your team, or any tool, can build from.

Step 5: Record or Generate the Voiceover

The voiceover carries most of the meaning, so choose it deliberately:

• Your own voice: authentic, but it needs a quiet room, a decent mic, and retakes.
• A professional voice actor: polished, but slower and more expensive to update when the product changes.
• A stock AI voice: fast, consistent, and easy to regenerate when one line of the script changes.
• A cloned voice: your own voice generated by AI, so a founder can narrate without a recording booth. See our guide to AI voice cloning for narration.

Not sure which fits? Compare the options in cloned voice, stock AI voice, or no narration.

If your product UI or pricing changes often, choose a voice you can regenerate in minutes, because re-booking a voice actor for one changed sentence is where explainers go stale.

Step 6: Add Music and Sound

Music sets the pace but should never compete with the narration. Pick a track whose tempo matches your cut rhythm, keep it low, and duck it further under every spoken line.

Use sound effects sparingly, for moments like a click, a reveal, or a transition into the call to action. If you notice the music on a second watch, it's too loud.

Step 7: Check It Before You Publish

Run these four checks on the finished cut:

1. The 10-second test. Does the problem appear in the first 10 seconds? Wistia's video length guide, which draws on its 2026 State of Video Report covering more than 13 million videos, reports that videos under a minute average a 52% engagement rate, so assume many viewers never reach your second half.
2. The mute test. Watch it with the sound off. Can you still follow the idea?
3. The phone test. Watch it on a phone at arm's length. Is every word of on-screen text readable?
4. The one-action test. Is there exactly one call to action at the end?

A video that passes all four is ready to embed. One that fails the 10-second test needs a new opening, not a new edit.

How to Make an Explainer Video Faster With AI

Steps 3 through 6 used to take a team several weeks. AI explainer video tools now handle most of that production.

With Poko Motion, you start from material you already have, such as a website URL, slide deck, code repository, or PDF. Poko pulls your real copy, UI, and brand styling, then builds animated scenes, narration, and music around them. You refine the result by typing, like "slow down the second scene" or "make the CTA bigger," instead of editing a timeline.

Poko builds three styles: a 40-45 second motion ad, a roughly 60-second walkthrough, and a 1.5-2 minute voiceover-led research explainer for PDFs. To see it in practice, read how to make an explainer video from a landing page URL or turn a research paper into an explainer video.

AI speeds up production, but it doesn't write your one-sentence brief for you. Do Steps 1 and 2 yourself, then let the tool build from them.

Common Explainer Video Mistakes

• Explaining everything. One message per video. Split the rest into follow-ups.
• A slow opening. A logo sting or a "Hi, we're..." intro spends your best seconds on something viewers didn't come for.
• Over-budget scripts. 300 words squeezed into 90 seconds forces a rushed voiceover.
• Visuals that fight the script. What's on screen should match what's being said, line by line.
• Unsourced proof. An invented "10x faster" costs more trust than it earns.
• No call to action, or three of them. End with one clear next step.

Your Next Step

Open a blank document and write your one-sentence brief. Then draft the five beats inside a 150-word budget and read them aloud with a timer. Once the script fits, the storyboard, voiceover, and visuals take hours instead of weeks.