Video generation is usually approached backwards. A scene is briefed in text, the expensive dice are rolled, and whatever performer the render invents is accepted onto the chart. The stills of the series are then left competing with a stranger’s clip. Keyframe-first reverses the order. The still is made first — charted, judged, already approved — and video becomes a motion pass over a frame that has already earned its place.
The four steps
1. Make the still as a first frame. Compose with movement in mind: the subject placed with room around her, a direction left open to turn or walk toward, a background that rewards a few seconds of looking. A still composed as a poster makes a cramped keyframe. Leave the frame somewhere to go.
2. Brief one movement. The motion line is a stage direction, not a plot: “turns slowly toward the spotlight and lowers her eyes.” One movement for the subject, none for the camera. Every added moving element multiplies the ways a render can smear, and a short clip is read in a glance anyway.
3. Render at the destination’s measure. Video pricing follows duration and resolution, so decide where the clip will live before it is rendered. A feed teaser and a store piece sit at different measures. Rendering the maximum of everything, for safety, is how a budget quietly doubles.
4. Judge it as a clip, not as a still. Watch at full speed, twice. Once for the performer: does she stay herself through the movement? Once for the joins: hands, hair, the edges of the background at the turn. A clip that passes both viewings joins the chart. One that fails receives a new motion line — not a second roll of the same one.
Why the chart costs less this way
The expensive mistakes in video are character mistakes, and keyframe-first moves them down to the 6-credit still, where they cost a fraction to correct. By the time a render is priced in video credits, the only open question is motion — which happens to be the question video models answer best.