How to Make an AI Video (Step by Step)

Making an AI video has gone from a research project to a five-minute task. The hard part now isn't the technology — it's the handful of choices that decide whether the output is usable. Here's the process, and where each decision actually matters.

1. Write the prompt like a brief, not a search query

The single biggest lever on quality is the prompt. A vague line ("a video about my app") gives you a vague video. Treat it like briefing a freelancer:

What it is — one concrete sentence.
Who it's for — the specific person, not "everyone".
The one thing to land — a single benefit or idea. Not three.
Tone and reference — "calm and premium, like an Apple ad" or "fast, punchy, UGC-style". Name something.

You can always regenerate with a tighter prompt. Starting tight saves rounds.

2. Pick the right type of tool

"AI video" covers three different products, and using the wrong one is why people get disappointing results:

Generative models (like Runway) — best raw visual quality and creative control, steeper learning curve, credits burn fast. Right for cinematic or hero shots.
Template / stock tools (like InVideo) — assemble stock footage and captions from a prompt. Right for explainers and long-form.
Ad generators (like LaunchReel) — turn a product description into short-form ad cuts with hook, captions, voiceover and music already in place. Right for marketing video you need often.

If your goal is posting or running ads, an ad generator gets you to a finished result with the fewest decisions. If you want a specific cinematic shot, use a generative model.

3. Generate variations, not one video

Ask for multiple takes. One generation is a coin flip; a set of five lets you see which framing and hook actually fit your product before you invest any editing time. This is also how you build a test set for paid ads — LaunchReel returns five angles per run for exactly this reason.

4. Fix the script before you fix the visuals

If the hook line is weak, no amount of visual polish saves the video. Read the first sentence out loud. Would it stop you scrolling? If not, rewrite it — most tools let you edit the hook and voiceover copy directly. A strong hook on average footage beats a weak hook on great footage every time.

5. Caption, voice and music

For short-form, captions are not optional — most people watch on mute. You want:

Word-level captions, styled to stay readable over busy footage.
A voiceover that reads the script at a natural pace (or none, if the captions carry it).
Music under the dialogue, ducked so it doesn't fight the voice.

Good tools do all three automatically. If yours doesn't, that's your editing work — see our note on AI video editors.

6. Trim, then export

Cut the intro until the video starts on the hook. Shorten anything that drags. Export vertical (9:16) for TikTok, Reels and Shorts; add 1:1 for feed. Then upload to the platform or ad manager.

The short version

Write a specific prompt → pick the tool type that matches your goal → generate a set of variations → fix the hook → let the tool handle captions/voice/music → trim and export. Most of the quality is decided in steps 1 and 4.

Want to skip straight to the output? Make your first video free — no credit card.