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videos/README.md

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+# SparseVideoNav Privacy-Processed Videos
+
+This directory supplements the existing `bvn/` and `ifn/` frame releases with episode-level MP4 files.
+
+- All videos are privacy processed for face and license-plate blurring.
+- All released MP4 files are H.264 at 256×256 resolution.
+- The prepared source collection mixes videos derived from privacy-processed raw recordings with fallback videos reconstructed from processed 256×256 RGB frames.
+- Per-video raw-versus-fallback provenance was not retained by the prepared source collection.
+- Two missing public episodes were reconstructed from their processed RGB frames while aligning this release.
+- Revisit episodes are intentionally excluded.
+
+## Layout
+
+```text
+videos/
+├── README.md
+├── manifest.json
+├── bvn/
+│   ├── metadata.jsonl
+│   └── <episode_id>.mp4
+└── ifn/
+    ├── metadata.jsonl
+    └── <episode_id>.mp4
+```
+
+Each `episode_id` matches the corresponding record in `bvn/annotations.json` or `ifn/annotations.json`.
+
+## Summary
+
+| Subset | Episodes | Duration | Bytes |
+| --- | ---: | ---: | ---: |
+| BVN | 5,433 | 57.35 h | 5,944,679,509 |
+| IFN | 6,260 | 64.40 h | 6,953,487,944 |
+| Total | 11,693 | 121.74 h | 12,898,167,453 |

videos/manifest.json

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+{
+  "format_version": 1,
+  "source_collection": "/mnt/HDD-raid/siqiteam/sparsevideonav_merged",
+  "subsets": {
+    "bvn": {
+      "episodes": 5433,
+      "duration_seconds": 206448.14,
+      "size_bytes": 5944679509,
+      "duration_hours": 57.346706
+    },
+    "ifn": {
+      "episodes": 6260,
+      "duration_seconds": 231827.795,
+      "size_bytes": 6953487944,
+      "duration_hours": 64.39661
+    }
+  },
+  "totals": {
+    "episodes": 11693,
+    "duration_seconds": 438275.935,
+    "duration_hours": 121.743315,
+    "size_bytes": 12898167453
+  },
+  "release_alignment": {
+    "prepared_videos": 11691,
+    "frames_fallback_reconstructed": 2,
+    "excluded": {
+      "revisit": 1592,
+      "unmapped_source_file": 2
+    }
+  },
+  "validation": {
+    "all_h264": true,
+    "all_256x256": true,
+    "unique_episode_ids": true,
+    "metadata_video_files_match": true
+  }
+}