Update overview thumbnail collage

assets/assemble_parts_overview.mp4

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:8de31353714c71f46819834c73f5a5bf9930e36f1ab3743afc62a3fa3fab36e0
-size 1426201
+oid sha256:b2bbd6b383cccc35aa4a0d29636feb215b56159ff6bb25b06f488e1296ba9af0
+size 1458311

assets/assemble_parts_overview_manifest.json

@@ -1,10 +1,10 @@
 {
-  "description": "README preview assets generated from one representative task-board assembly episode. Six synchronized camera streams are shown individually and as a 3x2 overview mosaic. The clip is played at 10x speed.",
+  "description": "README overview thumbnail generated as a shuffled collage of multiple main-camera and wrist-camera clips. It intentionally excludes tactile streams and is not a fixed six-view synchronized grid.",
   "source_season": "season_POC22061_2026_06_20_19_18_15_train",
   "source_format": "lerobotv2.1",
   "source_episode": "episode_000000.mp4",
   "source_window_start_seconds": 10.0,
-  "source_window_duration_seconds": 100.0,
+  "source_window_duration_seconds": 50.0,
   "playback_speed": "10x",
   "views": [
     "head_left",
@@ -51,5 +51,94 @@
         "mp4": "assets/example_views/tactile_raw.mp4"
       }
     }
-  }
+  },
+  "source_view": "head_left",
+  "overview_layout": "4 columns x 3 rows shuffled collage using head_left, head_right, wrist_left, and wrist_right clips",
+  "overview_source_path": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.head_left/episode_000000.mp4",
+  "overview_tiles": [
+    {
+      "tile_index": 1,
+      "episode": "episode_000000.mp4",
+      "view": "head_left",
+      "start_seconds": 10.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.head_left/episode_000000.mp4"
+    },
+    {
+      "tile_index": 2,
+      "episode": "episode_000003.mp4",
+      "view": "wrist_right",
+      "start_seconds": 22.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.wrist_right/episode_000003.mp4"
+    },
+    {
+      "tile_index": 3,
+      "episode": "episode_000006.mp4",
+      "view": "head_right",
+      "start_seconds": 34.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.head_right/episode_000006.mp4"
+    },
+    {
+      "tile_index": 4,
+      "episode": "episode_000009.mp4",
+      "view": "wrist_left",
+      "start_seconds": 46.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.wrist_left/episode_000009.mp4"
+    },
+    {
+      "tile_index": 5,
+      "episode": "episode_000001.mp4",
+      "view": "wrist_left",
+      "start_seconds": 18.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.wrist_left/episode_000001.mp4"
+    },
+    {
+      "tile_index": 6,
+      "episode": "episode_000004.mp4",
+      "view": "head_right",
+      "start_seconds": 30.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.head_right/episode_000004.mp4"
+    },
+    {
+      "tile_index": 7,
+      "episode": "episode_000007.mp4",
+      "view": "wrist_right",
+      "start_seconds": 42.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.wrist_right/episode_000007.mp4"
+    },
+    {
+      "tile_index": 8,
+      "episode": "episode_000010.mp4",
+      "view": "head_left",
+      "start_seconds": 54.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.head_left/episode_000010.mp4"
+    },
+    {
+      "tile_index": 9,
+      "episode": "episode_000002.mp4",
+      "view": "head_right",
+      "start_seconds": 14.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.head_right/episode_000002.mp4"
+    },
+    {
+      "tile_index": 10,
+      "episode": "episode_000005.mp4",
+      "view": "head_left",
+      "start_seconds": 26.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.head_left/episode_000005.mp4"
+    },
+    {
+      "tile_index": 11,
+      "episode": "episode_000008.mp4",
+      "view": "wrist_left",
+      "start_seconds": 38.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.wrist_left/episode_000008.mp4"
+    },
+    {
+      "tile_index": 12,
+      "episode": "episode_000011.mp4",
+      "view": "wrist_right",
+      "start_seconds": 50.0,
+      "source": "season_POC22061_2026_06_20_19_18_15_train/lerobotv2.1/videos/chunk-000/observation.images.wrist_right/episode_000011.mp4"
+    }
+  ]
 }