How to write a 20-second voiceover script
A video of up to 20 seconds takes a script of up to 50 words. That is about three or four short sentences: a hook, a point and a call to action.
No subscription · Credits never expire · From $9
- Up to 20 secondsone continuous clip
- Built-in voiceoverup to 20 s, 50 words
- Talking photolip-sync, 4 or 8 s
- Full HD or 4Kenhanced automatically
BetterVideo at a glance
BetterVideo (bettervideo.io) is an AI video platform. It makes short videos from a sentence (text to video) or a photo (image to video), adds built-in music or a voiceover, and delivers them in Full HD 1080p or 4K Ultra HD. It also enhances and upscales videos made in other tools. Credits are sold in packs from $9, never expire, and there is no subscription.
- Maximum clip length
- 20 seconds, for both text to video and image to video
- Built-in voiceover
- Up to 50 words, up to 20 seconds, with a male or female voice
- Lip-sync (Talking photo)
- 4 or 8 seconds, about 20 words, from a photo with a clear face
- Music
- 10 AI-generated styles; one sound (music or voiceover) per video
- Resolution
- Full HD 1080p or 4K Ultra HD, enhanced from a 720p original
- Shapes
- Vertical 9:16 or horizontal 16:9
- Enhancement
- Included in every Create video; a separate enhancer upgrades any video up to 5 minutes
- Pricing
- Credit packs from $9, no subscription, credits never expire
Facts checked 2026-10-01.
The structure
- Hook: one line that grabs attention
- Point: what you offer or what is new
- Call to action: what to do next
Word counts and lengths
- Up to 10 words: up to 5 seconds
- Up to 20 words: 6 to 10 seconds
- Up to 37 words: 10 to 15 seconds
- Up to 50 words: 15 to 20 seconds
Example: a product
Tired of tangled cables? Meet the one cord that does it all. Fast charging, clean desk, in three colours. Order today and get free shipping this week.
Example: an event
One night only. Live music, great food and a garden full of lights. Saturday, eight p.m. Bring a friend and come early.
Check your count
The counter under the script box shows your words, the length and the price as you type.
Edit it down
Write a first draft, then cut. Remove openers such as welcome lines, remove repeated ideas and keep sentences that start with a verb. If the script runs over 50 words the counter tells you to shorten it. A tighter script usually sounds better and always costs less.
Already have a video, even one made in another tool?
Sharpen it and upscale it to Full HD or 4K with the same credits. See how to upscale an AI video to 4K → or enhance a video now →
Frequently Asked Questions
Shorten it to 50 words or fewer, or split it across two videos.
Words are counted. Use full stops for natural pauses.
Yes. Write them the way you want them said.
Keep reading
- With VoiceoverWrite a script, pick a male or female voice and get a finished AI video with the voiceover already in it. Up to 20 seconds, Full HD or 4K.
- An ai videoWrite a script, pick a male or female voice and get an AI video with the voiceover already in it, up to 20 seconds.
- 20-Second VideosMake a single AI video up to 20 seconds long from a sentence, with a voiceover or music. See how script length sets the length and the price.
- AI video guidesPlain-English guides: how to write a prompt, add a voiceover, choose Full HD or 4K, make vertical video and more. Up to 20 seconds, no subscription.
- Text to VideoType a sentence and get a finished video with music or a voiceover, up to 20 seconds, in Full HD or 4K. Pay as you go. Credits never expire.
- Image to VideoTurn a photo into a moving video ad, or make the face in a photo speak. Music or voiceover, Full HD or 4K, up to 20 seconds. No subscription.
← Back to AI video guides
Ready to make your video?
Pick a pack, describe your video and download it in a few minutes.
No subscription required. Credits never expire.