How to Make Short Videos with AI: A Step-by-Step Guide

Making a short video with AI takes four decisions: what the video is about, what it says, how it sounds and how it looks. An AI short video generator handles the production in between, which means the script, the visuals, the voiceover, the captions and the music are assembled for you into one file that is ready to post.

This guide walks through the whole process using the AI Short Video Generator, and explains the choices that separate a video people watch to the end from one they swipe past.

What an AI short video generator actually does

A short video has five parts: a script, a voice reading it, visuals that change every few seconds, captions and background music. Made by hand, each part is a separate job in a separate tool. A short video generator chains them together:

1. It turns your topic into a script written for short-form pacing.
2. It converts the script into a voiceover.
3. It generates an image for each beat of the script.
4. It times captions to the voice.
5. It lays music underneath and renders the result in the aspect ratio you picked.

You stay in charge of the inputs. The better the inputs, the better the video, so the rest of this guide is about making those choices well.

Step 1: Choose a topic narrow enough for 40 seconds

The most common mistake is picking a topic that needs five minutes. A short video carries one idea. "The history of Rome" is a documentary. "Why Roman concrete still stands after 2,000 years" is a Short.

A useful test: can you state the payoff of the video in one sentence? If you can, the topic is narrow enough. If you need the word "and", split it into two videos.

In the generator you can type a topic, a tone or a few keywords. You can also leave the prompt blank and let the AI come up with the concept, which is a fast way to get unstuck when you need ideas for a niche.

Topic formats that suit short videos:

• A single surprising fact and the reason behind it
• A mistake your audience makes and the fix
• A short story with a clear turn at the end
• A ranked list of three, not ten
• A myth and what is actually true

Step 2: Get the script right before anything else

The script decides whether the video works. Visuals and voice can only carry what the words give them.

The generator writes a script from your topic, and you can edit it or replace it entirely with your own. Whichever you choose, check three things.

The first sentence is the hook. Viewers decide in the first second or two. Start with the most interesting claim in the video, not with a greeting or a setup. "Your phone is listening, but not the way you think" beats "Today we are going to talk about phone privacy".

Every sentence earns the next one. Read the script aloud. Anywhere you would be tempted to skip ahead, a viewer will swipe. Cut it.

The ending lands. Finish on the payoff you promised in the hook, then stop. A long sign-off drags down the share of people who finish the video.

For length, the generator offers 40-second and 80-second videos. Shorter is the safer default for a new account: it is easier to hold attention for 40 seconds, and a video that most people finish tends to be shown to more people. Use 80 seconds when the idea genuinely needs the room, such as a story with a setup and a twist.

Step 3: Pick a voice that fits the content

There are nine AI voices to choose from. The right one depends on the content more than on personal taste:

• Calm, measured voices suit explainers, history and finance.
• Energetic voices suit lists, quick tips and entertainment.
• Warm, conversational voices suit stories and motivational content.

Whatever you pick, keep it for the whole channel. A consistent voice becomes part of how viewers recognise your videos, the same way a consistent presenter would.

Step 4: Choose a visual style and stick to it

The generator creates the images for each scene in the style you select, including Realistic, Cinematic, Anime and 3D. You can also write a custom style description if you want something specific, such as a watercolor look or a vintage film look.

Two pieces of advice here:

Match the style to the subject. Realistic and cinematic styles suit true stories, history and business. Anime and 3D styles suit fiction, gaming and playful topics.

Do not change style from video to video. A channel where every video looks related reads as a brand. A channel where every video looks different reads as random uploads.

If you already have your own photos, such as product shots, property photos or travel pictures, use the photo to video maker instead. It builds the same kind of narrated video around images you upload.

Step 5: Add captions and music

Many people watch with the sound off, at least for the first few seconds. Captions are what keep them. The generator adds captions automatically and lets you choose a template, colors and animation.

Keep captions large, high-contrast and away from the bottom and right edges of the frame, where each platform places its own buttons and description text.

For music, pick a preset track that matches the mood or add your own. Music should sit under the voice. If you notice the track, it is too loud or too busy.

Step 6: Export in the right aspect ratio

• 9:16 (vertical) for YouTube Shorts, Instagram Reels and TikTok. This is the default for almost everything.
• 1:1 (square) for feed posts where a square crop performs well.
• 16:9 (horizontal) for regular YouTube videos, websites and presentations.

You can also add your own watermark so that the video carries your brand when it is re-shared.

How to post so the video gets a fair chance

A good video still needs a sensible upload:

• Write a title that restates the hook. It appears on screen next to the video on most platforms.
• Post the same video to all three platforms. A vertical video works on Shorts, Reels and TikTok without changes.
• Post consistently. Three videos a week for three months teaches you more than thirty videos in one week.
• Read the retention graph. Each platform shows where viewers drop off. The drop-off point tells you which sentence to cut next time.

If consistency is the hard part, you can hand it over entirely. Short Series generates new videos on a schedule you set, so the channel keeps publishing while you do other work. We cover that in detail in how to automate YouTube Shorts.

Common mistakes to avoid

• Starting slowly. No intros, no logos, no "hey guys". Open on the hook.
• Covering too much. One idea per video.
• Ignoring the script. Regenerating visuals will not rescue a weak script. Fix the words first.
• Changing everything at once. Change one thing per video, such as the hook style or the voice, so you can tell what made the difference.
• Giving up after ten videos. Short-form rewards volume and iteration. Early videos are practice.

Frequently asked questions

Do I need editing skills to make short videos with AI?

No. The generator produces a finished video with voiceover, visuals, captions and music. Your work is choosing the topic, checking the script and picking the voice and style.

Can I use my own script?

Yes. You can supply your own voiceover script instead of the generated one. This is the best option when you already know exactly what you want to say.

Which platforms can I post AI short videos to?

A vertical 9:16 video works on YouTube Shorts, Instagram Reels and TikTok. Square and horizontal exports are available for feeds, websites and regular YouTube videos.

How long should an AI short video be?

For most topics, around 40 seconds. Use the 80-second option when the idea needs a setup and a payoff that will not fit in less.

Can I make short videos without showing my face?

Yes. Generated videos use AI visuals and an AI voice, so you never appear on camera. For a full strategy, read how to do faceless marketing.

Make your first video

Pick one narrow topic, write or generate a script with a strong first sentence, and choose a voice and style you can keep using. Then open the AI Short Video Generator and create your first short video.