Update README.md (#4)

- Update README.md (95853906a54556d028711a792f537c92aff405a1)

README.md

@@ -12,7 +12,46 @@ Download with:
 huggingface-cli download 1x-technologies/worldmodel --repo-type dataset --local-dir data
 ```
 
-Current version: v1.1
+Current version: v2.0
+
+Contents of train/val_v2.0
+- **videos** - 
+- **segment_indicies** - For video `i` and frame `j`, `segment_idx_i[j]` uniquely points to the segment index that frame `j` came from. You may want to use this to separate non-contiguous frames from different videos (transitions).
+- **robot_states** - States arrays defined in `Index-to-Joint Mapping` stored in `np.float32` format. For video `i` and frame `j`, the corresponding state is given by `states_i[j]`.
+- **metadata** - The `metadata.json` file provides high-level information about the entire dataset, while `metadata_[i].json` files contain specific details for each individual video `i`.
+
+  #### Index-to-State Mapping (NEW)
+  ```
+   {
+        0: HIP_YAW
+        1: HIP_ROLL
+        2: HIP_PITCH
+        3: KNEE_PITCH
+        4: ANKLE_ROLL
+        5: ANKLE_PITCH
+        6: LEFT_SHOULDER_PITCH
+        7: LEFT_SHOULDER_ROLL
+        8: LEFT_SHOULDER_YAW
+        9: LEFT_ELBOW_PITCH
+        10: LEFT_ELBOW_YAW
+        11: LEFT_WRIST_PITCH
+        12: LEFT_WRIST_ROLL
+        13: RIGHT_SHOULDER_PITCH
+        14: RIGHT_SHOULDER_ROLL
+        15: RIGHT_SHOULDER_YAW
+        16: RIGHT_ELBOW_PITCH
+        17: RIGHT_ELBOW_YAW
+        18: RIGHT_WRIST_PITCH
+        19: RIGHT_WRIST_ROLL
+        20: NECK_PITCH
+        21: Left hand closure state (0 = open, 1 = closed)
+        22: Right hand closure state (0 = open, 1 = closed)
+        23: Linear Velocity
+        24: Angular Velocity
+    }
+
+
+Previous version: v1.1
 
 - **magvit2.ckpt** - weights for [MAGVIT2](https://github.com/TencentARC/Open-MAGVIT2) image tokenizer we used. We provide the encoder (tokenizer) and decoder (de-tokenizer) weights.
 
@@ -25,7 +64,7 @@ Contents of train/val_v1.1:
   - **neck_desired** `(N, 1)`: Desired neck pitch.
   - **l_hand_closure** `(N, 1)`: Left hand closure state (0 = open, 1 = closed).
   - **r_hand_closure** `(N, 1)`: Right hand closure state (0 = open, 1 = closed).
-  #### Index-to-Joint Mapping
+  #### Index-to-Joint Mapping (OLD)
   ```
    {
         0: HIP_YAW