Most AI video tools start from nothing. You write a prompt, the model invents footage, and you iterate until something usable comes out. Runway's Aleph 2.0 flips that entirely. It takes footage you already have, applies one targeted change, and hands back the same clip with everything else untouched. Now that model is available through the Runway API, meaning you can wire it directly into your own products and pipelines.
The problem it actually solves
Commercial production starts from footage that's already been shot and color-graded, that now needs a single specific change. The seasonal variant of one campaign film. The wardrobe swap a client signs off on three days before launch. The old answers were a roundtrip through compositing software or a reshoot. Both are slow, and both lock the rest of the clip into whatever the first edit sets in motion.
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