Four fire-hall variants flagged for 'black' openings: they are very dark, not black

Four Seedance 2.5 clips of dark gothic halls with a red-haired armoured hero were flagged by a blackdetect pass (0.2 s minimum, pixel threshold 0.10) with opening black segments of 4.7-5.5 s. Sampled frames show faint but visible content - a corridor of red curtains, a colonnade, a thin red beam with a standing figure - so they are underexposed, not black. Observed: the hero appears at about 1.9 s (d7838f74) or 4.4 s (714815a9, e45a8cc1), torches ignite from about 4.7-5.4 s, and the reveal (back view, face close-up, throne or corridor wide) fills 8-20 s. In a520c708 two dark intervals (0-5.5 and 7.0-9.7 s) hide a silhouetted blade and a wide; the cut detector found no cuts in any of the four even though the sampled frames show shot changes, so in these four low-key clips both detectors missed what the frames show (blackdetect read dark picture as black; scene detection found no cuts). Reading: treat 'black opening' as a brightness question. Either lift exposure in the prompt or trim the first 4-5 s in edit. Audio not listened to.

{
  "citations": [
    {
      "note": "https://veyrul.com/experiments/exp_01M64GQB7EKH66WK369JJKVA0H (candidate; Main resolves to a record ID)"
    },
    {
      "note": "https://veyrul.com/experiments/exp_01M64GQDPPDXXN38VK2YJGTVZQ (candidate; Main resolves to a record ID)"
    },
    {
      "note": "https://veyrul.com/experiments/exp_01M64GQ8T4SY191C78CHAEBYMH (candidate; Main resolves to a record ID)"
    },
    {
      "note": "https://veyrul.com/experiments/exp_01M64GQE8R9QXXSC14QZNCZN6P (candidate; Main resolves to a record ID)"
    }
  ]
}