B-roll Avatar Camera (the avatar SEEN doing something)

The realistic action counterpart of the broll skills, starring our own avatar:

• broll-story → an illustrated 6-panel storyboard animated by seedance-2 (great for invented side-characters / stylized vignettes).
• broll-generator → presenter-free synthetic B-roll; broll-finder → real footage.
• broll-avatar-camera → OUR avatar, photoreal, DOING something — a single realistic action start frame (built like a camera angle) animated by prunaai/p-video-avatar, the same model as our talking-heads, driven by the beat's narration audio.

Why p-video-avatar (the same model as the talking-heads, not plain p-video): it keeps the avatar's face/wardrobe/room identical to the talking-head beats, and it's audio-driven — feed it the beat's narration slice and the avatar lip-syncs to it (when the mouth is visible) while the clip length matches the beat. The action itself is directed by the video_prompt param ("takes a book from a shelf while talking") and negative_prompt keeps unwanted stuff out. The clip is muted on disk; avatar-reel-composer re-lays the single master narration over it (so no double audio — the lip-sync visuals stay in sync because the same slice drove them).