{
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  "stage_2_start": "2026-01-05T10:53:40.245086",
  "stage_3_start": "2026-01-05T10:53:47.271069",
  "stage_4_start": "2026-01-05T10:53:52.320075",
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    "contact_recording": 5.049006700515747,
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    "vt_sensors": {
      "vt_1": {
        "static_video": "data/session_20260105_105337/vt_1/static/static.mp4",
        "contact_video": "data/session_20260105_105337/vt_1/contact/contact.mp4"
      },
      "vt_2": {
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        "contact_video": "data/session_20260105_105337/vt_2/contact/contact.mp4"
      }
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  },
  "label": "4"
}