How to add an AI voiceover to a video

To add an AI voiceover to a video, start with a clean recording, generate or write the narration, edit the words against the footage, preview a voice, and export the finished MP4. With ScreenDub, you can record in the browser or upload an MP4, WebM, or MOV. It analyzes the source, drafts narration for the video segments, lets you correct each line, and voices the approved script. You can then add captions, chapters, subtitles, and a written PDF guide from the same project. This guide explains the workflow and the editorial checks that keep an AI voiceover accurate and natural.

When an AI voiceover is a good fit

AI voiceover is useful when the visual recording already exists but the audio is missing, inconsistent, or needs to be localized. It is especially practical for product tutorials, feature demos, onboarding lessons, and narrated slide decks that will be updated over time. The narration starts as editable text, so changing one product name or instruction does not require setting up a microphone and recording the whole track again.

A human voice may be the better choice when the video depends on a presenter’s personal story, an established spokesperson, a performance, or a delivery that must sound unmistakably like one person. ScreenDub supports microphone recording too. Choose the voice based on the audience and the purpose, not just on production speed.

What you need

• A video source: record in the browser or bring an MP4, WebM, or MOV.
• A clear purpose and audience, so the narration explains the right things.
• The product’s official terminology, names, numbers, and warnings for script review.
• A recent Chrome or Edge browser for the smoothest recording workflow.

How to add an AI voiceover to a video

1. Record or upload the source. Record a tab, window, or full screen in the browser, or upload an existing MP4, WebM, or MOV. Start and end close to the useful content so the generated segments do not begin with setup or end with cleanup.
2. Review the footage before it is processed. Trim mistakes, crop distracting areas, and blur private details during the local review step. A clean source gives the script less irrelevant material to describe. See Editing your recording.
3. Set the narration direction. Choose a language, voice, accent, and script style. Use the style to set delivery—such as tutorial or demo—while keeping the facts in the source and your review notes.
4. Read the generated script against the video. Confirm that each line refers to the correct moment, fixes the product’s official names, and explains why an action matters. Remove lines that only repeat visible button labels.
5. Correct individual segments. Keep each segment to one idea and make edits line by line. ScreenDub supports corrections and re-narration without requiring a new full recording; see Corrections & re-narration.
6. Preview the voice on the real footage. Listen for pronunciation, pace, pauses, emphasis, and whether the line finishes before the on-screen action changes. You can preview a voice and change it before committing to the export; see Choosing a voice & accent.
7. Export the finished video. Render the standard MP4, then decide whether to burn in captions, export a separate subtitle file, add chapters, or download the PDF guide.

Worked example: voicing a silent feature walkthrough

Imagine a two-minute silent recording showing how to create a project and invite a teammate. The recording is useful, but it does not explain the reason for the permission choice.

1. Upload the recording and remove the empty dashboard and the final mouse movement.
2. Read the generated narration against each segment and replace generic feature names with the official labels.
3. Add one sentence explaining that the selected role controls what the teammate can access.
4. Delete “click Send” if the button label is already obvious, but keep the sentence explaining what confirmation to expect.
5. Preview a calm instructional voice, check pronunciation of the product name, and listen for timing against the invite flow.
6. Export an MP4 with captions and generate the PDF guide for the support team.

The important work was not choosing a voice; it was checking that the narration added useful context without claiming more than the interface actually showed. That review pattern scales to demos, tutorials, training lessons, and translated versions.

How to make AI narration sound natural

Write for the ear

Use short sentences, ordinary punctuation, and one idea per segment. Long paragraphs can be correct on the page but difficult to follow when spoken over a moving interface. Read the script aloud once before export; awkward phrasing is easier to fix in text than after render.

Describe what the screen cannot

Do not narrate every visible click. Explain the purpose of the action, the decision being made, or the result to verify. “Choose Members” is a label. “Open Members to review who can access the workspace” gives the viewer a reason to act.

Keep timing honest

A line should finish while the viewer can still see the relevant state. If the sentence runs into the next action, shorten it, split the segment, or hold the screen longer. Never solve a timing problem by making the narration so fast that a first-time viewer cannot follow it.

Check names and pronunciation

Product names, acronyms, people’s names, currencies, and technical terms deserve a specific listening pass. Preview the voice and correct the script when a term is pronounced incorrectly or the wording does not match the interface.

Captions, subtitles, chapters, and translation

Captions make the voiceover usable with the sound off and provide an additional path for viewers who need on-screen text. ScreenDub lets you skip captions, burn them into the video, or export a separate subtitle file. Chapters break the video into parts aligned with its segments, so viewers can return to a specific step. See Captions and Titles & chapters.

The narration can be translated into 80+ languages from the same project. The source visuals remain the reference, while the translated script is re-voiced and the captions move with it. For customer-facing, regulated, or technical content, ask a fluent reviewer to verify terminology and meaning before publishing. The full product flow is in Translating narration.

AI voiceover versus recording your own voice

AI voice

Fast to revise, consistent across a library, and practical for localization

Human voice

Personal delivery, established presenter identity, and emotion that depends on the speaker

Best question

What will help this audience understand and trust the video?

Use the AI voice when consistency and easy updates matter most. Use your own voice when the relationship with the presenter is part of the content. A mixed library is reasonable: an AI voice for routine product lessons and a human recording for an announcement or customer story.

Common mistakes to avoid

• Publishing the generated script without checking product names, numbers, and permissions.
• Reading every button aloud instead of explaining the decision or result.
• Letting a sentence continue after the screen has moved to a different task.
• Choosing a voice from a sample without previewing it against the actual footage.
• Leaving captions out when viewers may watch muted or need text support.
• Translating a sensitive lesson without a fluent subject-matter review.

Current ScreenDub limits at a glance

Video input

Browser recording or MP4, WebM, or MOV upload

Video cap

Free 6 min; Creator 10 min; Pro 12 min; Teams 15 min per video

File cap

Uploads up to 650 MB; export quality up to 2K

Output

Standard MP4, optional burned-in/separate subtitles, chapters, and PDF guide

Languages

80+ narration and translation languages

Free plan

8 narration minutes/month, 3 exports/video, 5 guides/month, watermark

Frequently asked questions

Add your first AI voiceover with ScreenDub. Read Choosing a voice & accent for the product details, or continue with how to make a tutorial video by recording your screen.