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What it is

The problem with AI video for explainers isn't quality, it's drift. Clip 40 doesn't match clip 3. Motion Builder locks your style once into a motion sheet, a master reference image plus a short style-lock text. From then on every clip prompt is only the action: what enters, what moves, what settles.

What you get

  • Motion sheet system with nine style families, or start from your own reference image
  • Script to prompt pack: every beat time-coded to your voice-over and tagged by priority
  • Video-to-video: stylize footage, overlay graphics, transition out of it or inset it
  • A real logo fetcher, so the model never invents a logo
  • Cost gates: an estimate shown and approved before every batch
  • A free prompt-only mode

What you need

  • Claude Code or Claude Desktop
  • Python 3.10+
  • A Kie.ai or FAL.ai key to render, or the free prompt-only mode with any video tool

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