{
  "passed": true,
  "duration_seconds": 318.875,
  "video": "1920x1080 H.264 30fps",
  "audio": "AAC, loudness-normalized narration",
  "scenes_verified": 20,
  "assertions": [
    "object contact",
    "7.66 mm reading",
    "positive and negative corrections",
    "Practice reveal",
    "list/text toggle",
    "Challenge hint lock",
    "Challenge corrected answer",
    "new Challenge reset",
    "caption file and thumbnail",
    "metadata",
    "full media decode"
  ],
  "limitations": [
    "Landscape demonstration uses a browser viewport, not physical-device capture.",
    "Captions are phrase-timed, not word-aligned.",
    "A whole-number Challenge answer failed an earlier rehearsal assertion; final capture uses a non-round example.",
    "Not uploaded to YouTube."
  ]
}