How to Write AI Video Prompts That Actually Work

Two people can use the same AI video tool and get wildly different results. The difference is rarely the model — it is the prompt. A vague prompt leaves the model to guess, and it guesses average. A precise one tells it exactly what to render. Prompting is the one skill that improves every video you make, regardless of which tool you use.

A prompt is a shot description, not a wish

The most common mistake is writing the outcome you want ("a viral product video") instead of the shot you want to see. The model cannot render "viral." It can render a specific subject doing a specific thing, shot a specific way. Treat the prompt like a sentence you would hand a camera operator: who or what is in frame, what they are doing, and how it is shot.

The four levers that move output

• Subject — be specific about who or what is in frame. "A woman" is weak; "a woman in her 30s in a denim jacket holding a phone" is renderable.
• Action — give one clear motion per shot. The model handles "slowly raises the phone to eye level" far better than three actions at once.
• Camera — name the angle and move: close-up, slow push-in, low angle, handheld. This is what makes a clip feel directed instead of static.
• Lighting and mood — golden hour, soft studio light, moody neon. Lighting does more for the feel of a shot than almost anything else.

What makes prompts fail

• Cramming several ideas into one shot — split them into separate scenes instead.
• Abstract adjectives with no visual anchor ("premium," "engaging") — translate them into things a camera can see.
• Ignoring the aspect ratio — a shot framed for 16:9 falls apart cropped to 9:16; prompt for the frame you will publish.
• Contradicting yourself — "minimal but packed with detail" pulls the model in two directions.

The model cannot render "viral." It can render a specific subject doing a specific thing, shot a specific way. Write that.

For a multi-scene video, you should not be hand-writing every shot anyway. A planner can take one topic and author a per-scene prompt for each beat, so the structure is coherent before anything renders — we cover that in AI scene planning, from a one-line topic to a shot list. Your job shifts from writing every prompt to directing the few that matter.