B-Roll — Library & Placement System

4-Library Structure (Per Brand)

All reusable b-roll lives at {brand_local_path}/creatives/brolls/:

brolls/
├── ai-broll-library.md       # AI clips + Ken Burns (id prefix: aimg, ai)
├── app-broll-library.md      # App screen recordings (id prefix: app, disc, lnkd)
├── recordings-broll-library.md  # Screen/mobile/website (id prefix: wbst, scrn, mobi)
├── gfx-broll-library.md      # Graphics + overlays (id prefix: gfx, bnr)
├── ai/                       # AI-generated video clips
├── app/                      # App screen recordings
├── recordings/               # Screen, mobile, website clips
├── gfx/                      # Graphics, banners, overlays
└── images/                   # Source images (PNG/JPG) — input for AI clips