{
  "source": "Real Chrome SuperWatch canvas capture",
  "edit": "Two separate real acquisitions, equal 5-second excerpts, warm before label and green after label. No interstitial cards; normal playback speed.",
  "frames": 50,
  "duration_ms": 10000,
  "width": 1100,
  "height": 499,
  "bytes": 1268235
}