B-roll Story (avatar doing an activity)

The action / demonstration counterpart of the broll skills. Where broll-generator synthesizes presenter-free B-roll and broll-finder finds real footage, broll-story puts OUR avatar on screen DOING something — a silent, voice-over-ready clip where the focus is the action, not the dialogue (the avatar may be speaking, but it's off-screen narration, so there is no lip-sync). Think ALF grabbing the camcorder, or a full-body shot of the presenter showing a place, taking calls and scheduling on screen, seen from behind, cooking, building — optionally interacting with invented side-characters.

It is an orchestrator over two existing skills: gpt-image-2 (one storyboard sheet) → seedance-2 (animate it) → muted clip.