How to write AI motion graphics prompts

Kario Team · October 1, 2026 · 3 min read

Kario can make a whole video from one line. Whatever the line leaves out, Kario decides: who the video is for, what it argues, how it looks, how long it runs. A prompt is the list of those decisions you want to make yourself.

What Kario does with each part of a prompt

• A URL. Kario reads the page, up to about 12,000 characters, and takes its copy, colours and type. It can't sign in, so send screenshots of anything behind a login.
• Screenshots. Each one is rebuilt as layers, so the parts that change can move: a field filling in, a total updating, a row being selected.
• Exact words. Headlines, prices, dates and button labels in quotes. Anything you don't give, Kario writes.
• The beats, in order. Kario builds a scene for each one, in that order. Four beats fit in about 15 seconds. Each line on screen needs time to be read: about 3 seconds for 60 characters, at the 20 characters a second Netflix's subtitle guide allows.
• A look. If you don't describe one, Kario proposes a few to pick from before it animates anything.
• Length, shape and sound. "20 seconds, 16:9, music, no voiceover" settles four decisions. For a narrated video, say the language and the voice: the voiceover sets the video's length.
• Research. Turn it on in the chat box and Kario reads the brand, looks through its presets for videos that fit, and shows a storyboard to approve before it builds.

Two real briefs

One line. A French explainer on generative AI in schools started from "Les IA génératives en éducation, usages et limites." Kario chose the audience, the angle and the six scenes, proposed three looks and recorded a 59.9-second voiceover. How it was made.

A URL and a line. Hopwren's launch video came from its landing page. The headline and the three section titles in the video are the page's own words, and the colours, type and app screens are its own too. Where each shot came from.

The same video, briefed two ways

Make a video for our project management app launch.

A 20-second launch video for Tasklane, 16:9, for team leads at startups, sound on with music. Goal: signups on launch day. Beats: "Your standup, minus the meeting." → the board updating itself as teammates check in (screenshots attached) → "Saves 3 hours a week per team" → logo and tasklane.com. Off-white background, black type, our green (#16A34A) as the only accent, no stock imagery.

The first gets a launch video for a project management app. The second gets Tasklane's.

Notes on the first pass

Say where and what: "in the proof scene, hold '3 hours' for a full second" changes that layer; "make it more impactful" changes whatever Kario guesses. For a typo or a nudge, select the layer in the editor and change it yourself. Use the chat for changes that touch many layers at once, like pacing, colour or a new scene.