{
  "captions": true,
  "voice": "af_nova",
  "music_url": "https://4ort.live/v1/mtv/video/283ca7f16c86?download=1",
  "scenes": [
    {
      "id": "s1",
      "narration": "At eight miles per hour, the argon blanket holds. The weld pool glows steady, twelve hundred degrees Celsius in a perfect sphere. This is the calm before the prairie wind finds you."
    },
    {
      "id": "s2",
      "narration": "At eighteen miles per hour, convection tears the shield. A thermal shock front forms—one hundred twenty degrees Celsius per millimeter across the heat-affected zone. The gradient is born."
    },
    {
      "id": "s3",
      "narration": "The crack moves faster than your eye can follow. Differential expansion tears the joint before the arc dies. Nineteen percent penetration lost. This is not oxidation. This is fracture."
    },
    {
      "id": "s4",
      "narration": "Stop before the wind splits the granite. The math is on the page. Know your threshold. Respect the gradient."
    }
  ]
}