AI Video Generation
Definition
Using AI to turn a written idea into a finished video. Models write the script, generate the visuals, speak the narration, score the music, and cut it all together. What used to need a writer, a camera, a voice booth, and an editor now runs as one automated pass.
Three model families do the work and they run in order, not all at once. A language model drafts the script and splits it into scenes. A speech model reads the narration aloud. An image or video model renders frames for each scene, sized to how long that narration runs. Music comes from a model or a library, and an assembly pass burns in the captions and cuts everything to length.
The sequence is what separates a usable tool from a demo. The script decides the scene count, the scene count decides how much footage gets generated, and the narration length decides how long each shot has to hold on screen. Break that chain anywhere and you get a video that ends on five seconds of silence over a still image.
Cost follows the same logic. A small flat fee covers the script, the standard voice, the music, and the render, and the visuals are priced on top: by length for video clips, by generated image for photo scenes, with a small extra per scene for the premium voice on Pro and Studio. The exact rates sit on the pricing page, and every video is quoted in credits before the render starts.
The limits are worth knowing before you plan a series around this. Character continuity across scenes is unreliable, so the same person in scene one and scene five can come back with a different jaw. Text rendered inside a generated image is a coin flip on most models, which is why titles get composited afterward instead of prompted in. Anything that has to show a specific real product or a real building needs a reference image rather than a description.
Where it earns its keep is volume. One idea, ten variants, all rendering while you write the next batch.
Related terms
You write a description. A model reads it and produces a video with pictures, narration, music, and captions already in place. No footage to shoot and no timeline to cut. The description can be a single sentence or a full article, and what comes back is a finished file rather than a project to edit.
Short-Form VideoVideo short enough to watch without deciding to. Usually under 60 seconds, vertical at 9:16, and built to be understood with the sound off. TikTok, Reels, and Shorts all run on it. Each app allows longer uploads now, but the feeds still reward the short cut.
AI VoiceoverNarration spoken by a model instead of a person. You hand it text, it hands back audio with pacing, emphasis, and breath in roughly the right places. Good enough on a 30-second clip that most listeners never think about it, and cheap enough that you can redo the take forty times.
Video HookThe first one to three seconds, which is the whole audition. A viewer decides to stay or swipe before your second sentence lands, so the hook has to carry a promise the rest of the video pays off. Everything downstream inherits whatever audience the hook managed to keep.
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