Animation
Logo stings, motion graphics and short explainers. Scope is agreed before anything moves -- length, aspect ratios, whether there is audio -- because revising after animation has started is expensive. A storyboard or animatic is approved first; that is the stage where changes are cheap and where the revision rounds live. You get an MP4 master plus per-platform exports, MOV with an alpha channel where it has to sit over something, and GIF or Lottie for web and interface use.