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Static frames can be perfect and the video still feels cheap if the motion is dead. Professional motion design follows a grammar you can put directly in prompts:
  1. Nothing ever fully stops. Every “hold” carries ambient idle motion — a 1-2% breathing scale, slow drift, a shimmer. Never write “holds motionless”; write “settles into a gentle ambient idle.” A frozen final second is the single biggest cheap-motion tell.
  2. The camera is an actor. Give each scene one continuous camera move — a 4-8% push-in, a slow orbit, parallax between layered planes — easing gently but never settling on screen (compute the ease over a window slightly longer than the render).
  3. Overlapping action. No two elements share a start or end time. Entrances stagger at irregular offsets; the next element begins while the last is still settling.
  4. Overshoot and follow-through. Every pop scales past its target and settles back; letters can tumble in individually with rotation.
  5. Depth planes. One or two large, heavily-blurred foreground elements drifting near the lens sell depth instantly.
  6. Match pacing to genre. Showreel-style cuts run 1.5-4 seconds per idea; a stretched 8-second version of a 2-second idea feels slow no matter how it’s animated.

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The grammar, measured

The same composition built twice — identical content, identical layout; the only variable is the motion treatment. The first build commits the anti-patterns above: simultaneous identical entrances, no camera, a frozen final 2.4 seconds. The second applies the six rules. Every anti-pattern: tiles enter together, nothing overlaps, the last seconds are a freeze-frame. The six rules: staggered overshoot entrances, a continuous 5% push, ambient idle, a blurred foreground plane, sparkline draw-ins as secondary motion. The difference is measurable, not just visible: in the final second the frozen build has bit-identical consecutive frames, while the motion-grammar build changes every single frame — corroborated by the encoder (211KB vs 2.5MB for the same content). A frozen final second is the cheap-motion tell you can test for.