Document privacy-processed episode videos

README.md

@@ -71,7 +71,7 @@ Images are stored in compressed tar shards to avoid hundreds of thousands of sma
 │   └── shards/
 │       ├── bvn-00000.tar.zst
 │       └── ...
-└── ifn/
+├── ifn/
     ├── annotations.json
     ├── data.jsonl
     ├── merge_info.json
@@ -79,6 +79,15 @@ Images are stored in compressed tar shards to avoid hundreds of thousands of sma
     └── shards/
         ├── ifn-00000.tar.zst
         └── ...
+└── videos/
+    ├── README.md
+    ├── manifest.json
+    ├── bvn/
+    │   ├── metadata.jsonl
+    │   └── <episode_id>.mp4
+    └── ifn/
+        ├── metadata.jsonl
+        └── <episode_id>.mp4
 ```
 
 Current shard counts:
@@ -88,6 +97,12 @@ Current shard counts:
 | `bvn` | 8 | 14,597,684,355 |
 | `ifn` | 9 | 16,623,840,035 |
 
+## Episode Videos
+
+The `videos/` directory provides privacy-processed H.264 MP4 files for every released BVN and IFN episode. Video filenames use the same `episode_id` values as the corresponding annotation records. The release contains 5,433 BVN videos and 6,260 IFN videos, all at 256×256 resolution; Revisit episodes are not included.
+
+The prepared video collection combines privacy-processed raw recordings with frame-derived fallbacks where source videos were unavailable. See `videos/README.md` and `videos/manifest.json` for layout, provenance notes, and validation statistics.
+
 ## Data Format
 
 Each line in `bvn/data.jsonl` or `ifn/data.jsonl` is an episode-level JSON object.