update README.md and dataset card

README.md

@@ -28,15 +28,14 @@ task_categories:
   - object-detection
   - keypoint-detection
   - other
-configs:
-  - config_name: online_data
-    data_files:
-      - split: train
-        path: online_data/episodes/**/*
-  - config_name: offline_data
-    data_files:
-      - split: train
-        path: offline_data/episodes/**/*
+# The HF dataset viewer is disabled intentionally — SurgSync's
+# multi-modal structure (FFV1 video + Hive-partitioned parquets +
+# per-episode JSON metadata + calibration files) does not fit the
+# viewer's tabular preview model, and the FFV1 codec doesn't render in
+# most browsers. For a browseable preview of episodes, tasks,
+# annotations, and example clips, use the project page at
+# https://surgsync.github.io/ instead.
+viewer: false
 ---
 
 # SurgSync — Multi-modal dVRK Dataset (v1.0)
@@ -57,6 +56,17 @@ preprocessing pipelines (rectify, depth, optical flow, kinematic
 heatmaps), and every command-line invocation, see the toolkit
 repository linked above.
 
+> 📺 **No HF dataset viewer.** SurgSync's structure (FFV1 video +
+> Hive-partitioned parquets + per-episode JSON + calibration files)
+> doesn't fit Hugging Face's tabular preview model, and FFV1 doesn't
+> render in most browsers. The viewer is disabled by design — for a
+> browseable preview of episodes, tasks, annotations, and example
+> clips, **visit the project page at
+> [surgsync.github.io](https://surgsync.github.io/)**. Programmatic
+> access to the data is unchanged: use the toolkit's loader API
+> (`dvrk_data_processing.surgsync.open_dataset(...)`) against either
+> a local clone or `huggingface_hub.snapshot_download`'d copy.
+
 ---
 
 ## Dataset summary