How to Make a YouTube Shorts Voiceover (Word Counts, Hooks, AI Voices)

A Shorts voiceover has a brutal job: hook a viewer in 2 seconds, hold them for 15 to 60, and do it in a feed where the next video is one swipe away. The good news is that a strong Shorts voiceover is a repeatable process, not a talent lottery. You need a script sized to the format, a hook that fires instantly, a voice with energy, captions for muted viewers, and a clean audio export you can drop straight into your editor. Here is the full workflow, with specific numbers you can copy.

Why Shorts need tight scripts

Most Shorts land in one of three practical lengths: 15, 30, or 60 seconds. Natural narration runs at about 150 words per minute, and that one number sets your word budget before you write a single line. A 15 second Short gives you roughly 35 to 40 words. A 30 second Short gives you 70 to 80. A full 60 seconds gives you 140 to 150.

Write past those budgets and one of two things happens: you crank the audio speed until it sounds frantic, or the video runs long and viewers swipe before the payoff. Count words before you generate anything. Paste your draft into the free Shorts script timer to see exactly how long it will run at different speaking speeds, then cut until it fits with a second or two to spare.

The 2 second hook rule

Viewers decide whether to keep watching in about 2 seconds. That is roughly 5 to 8 spoken words, so your first line cannot be an introduction. No hello, no channel name, no context setting, and never the phrase in this video. The opening words must make a claim the viewer needs resolved or open a loop they want closed. Patterns that consistently work:

• Stop doing X: Stop cropping your gameplay clips like this.
• You are doing X wrong: You are seasoning chicken at the wrong time.
• Cost framing: This one setting is costing you two hours of battery a day.
• Contrarian claim: The best time to post Shorts is not when your audience is online.
• Countdown promise: Three edits that make any phone video look professional.

Write the hook last if you need to. Draft the body first, find the most surprising sentence in it, and move that sentence to the top. In the edit, the first word of narration should hit within the first half second of the video, never after a logo animation.

Write for retention: one idea, zero filler

A Short holds attention when every sentence advances a single idea. If your draft covers two tips, split it into two Shorts. One idea per video also makes your titles sharper and gives the algorithm a clearer signal about who should see it.

Then cut filler with zero mercy. Every deleted word buys back a fraction of a second, and at 40 to 150 words per script, fractions add up fast. Common offenders:

• Throat clearing: so basically, now, alright, let me show you.
• Narrating the obvious: as you can see, what I like to do is.
• Padding phrases: in order to becomes to, make sure that you becomes just the verb.
• Weak intensifiers: really, very, actually, super.

Finally, end with a direct next step. The last line should either tell viewers exactly what to do (try this tonight) or open the next loop (follow for part two, where the fix gets weirder). A Short that just trails off wastes its best real estate.

Worked example: a 30 second script

Here is a complete 30 second script for a phone tips channel. It is 77 words, which runs about 31 seconds at 150 words per minute, or right at 30 with the speaking speed nudged up slightly.

Script: Your phone battery is dying because of three settings you have never touched. First, background app refresh: turn it off and you can save up to two hours of battery a day. Second, screen brightness: switch it to auto and keep it below sixty percent indoors. Third, push email: change it to fetch every thirty minutes instead. Do all three tonight, then check your battery stats tomorrow morning. Follow for one practical phone fix every single day.

Notice the structure: a 13 word hook, three numbered steps of about 18 words each, a call back to a concrete action, and a follow prompt. That skeleton works for almost any niche. Swap in your own steps and you have a repeatable template.

Choose a voice and speed built for short-form

Short-form rewards energy. A calm documentary voice that works for a 10 minute video feels sluggish inside a 30 second vertical clip. When you pick a voice, favor brighter, more animated reads over smooth and neutral ones. TextSpeakPro gives you 135+ AI voices to audition, and its emotion controls let you push extra excitement into the hook line while keeping the body conversational.

Pacing matters just as much. Slightly faster than natural speech feels confident on Shorts, so set the adjustable speaking speed a notch above default, in the range of 1.05x to 1.15x. Beyond about 1.2x the read starts to sound rushed and your captions become hard to follow. And once a voice works, keep it. Using the same voice across your series builds recognition, and viewers scrolling past your tenth Short will know it is you before the first caption appears.

Generate the voiceover with TTS

With the script locked, the generation step takes a few minutes:

1. Paste your word-counted script into TextSpeakPro.
2. Audition 3 or 4 energetic voices on your hook line only, and pick the one with the most natural emphasis.
3. Apply emotion controls to the hook so the first 2 seconds carry extra punch.
4. Set the speaking speed to about 1.05x to 1.1x.
5. Preview the full read and fix anything the voice stumbles on. Respelling a brand name phonetically or adding a comma for a beat usually solves it.
6. Generate the final audio.

You can test the whole workflow before spending anything: the free plan includes a one-time 2,000 characters with 10 voices, and a 30 second script is only about 400 to 450 characters, so that covers roughly four practice Shorts. When you start publishing on a schedule, the Starter plan at 4 dollars per month includes 150,000 characters, enough for hundreds of 30 second scripts or well over 150 full 60 second ones.

Add captions: most viewers will not hear you

A huge share of Shorts plays with the sound off, in feeds, in public, on mute by default. If your video only works with audio, you lose those viewers in the first second. Captions are not a nice extra on Shorts, they are half the product.

TextSpeakPro can export subtitles and captions alongside your audio, so the timing already matches the voiceover and you skip manual transcription. When you style them in your editor, follow short-form conventions: show 1 to 4 words at a time, use a large bold font, and keep the text in the middle of the frame. Avoid the bottom fifth of the screen, where the Shorts interface covers your text, and the right edge, where the like and comment buttons sit.

Export and layer it in your editor

On TextSpeakPro paid plans you can download the finished voiceover as MP3 or WAV. Use WAV for editing when you can, since it survives the re-encode your editor applies on export without stacking compression artifacts. MP3 is fine for quick drafts.

In your editor, build the audio in three layers. The voiceover sits on top at full volume, starting on the very first frame. A music bed sits underneath at low volume, quiet enough that you never strain to hear a word, and ducked further during the hook. Optional sound effects mark transitions between steps. Then trim any silence from the head of the voiceover file, sync your caption file, and check the whole video once with sound off. If it still makes sense muted, it is ready.

Monetization and AI voices on YouTube

Two separate questions matter here, and creators often mix them up. The first is YouTube policy. YouTube monetizes original content that adds value, and what gets channels rejected is mass-produced, repetitious material, not narration itself. If you wrote the script, chose the footage, and did the edit, an AI voiceover is simply your production tool, the same as an editor or a stock music library. Faceless channels using AI narration are monetized every day on exactly this basis.

The second question is licensing, and this is the one creators forget. You need the right to use the generated audio commercially, which is what a monetized video is. TextSpeakPro includes commercial use on its paid plans, so voiceovers you generate there are safe for monetized channels. The free plan is for testing, so upgrade before you publish videos that earn revenue. For the full picture of building a channel around AI narration, see the guide for YouTubers using AI voiceovers.

The whole workflow, start to finish

1. Pick one idea and one format: 15, 30, or 60 seconds.
2. Write to the word budget: 35 to 40, 70 to 80, or 140 to 150 words.
3. Move your most surprising sentence to the top as the hook.
4. Cut every filler word, then verify the timing with the script timer.
5. Generate the voiceover with an energetic voice at about 1.1x speed.
6. Export the audio and the matching captions.
7. Layer voice over music, sync captions, and start narration on frame one.
8. Watch it once muted before you upload.

The first Short takes an hour. By the fifth, the whole loop from idea to upload takes 20 minutes, and that speed is exactly what a Shorts publishing schedule needs.