diff --git a/community_v3_migration/fix_dataset.py b/community_v3_migration/fix_dataset.py
index af8978f6a..89132fb43 100644
--- a/community_v3_migration/fix_dataset.py
+++ b/community_v3_migration/fix_dataset.py
@@ -78,6 +78,21 @@ def _write_jsonl(path: Path, rows: list[dict]) -> None:
             f.write(json.dumps(r) + "\n")
 
 
+def data_video_episode_mismatch(root) -> str | None:
+    """Return a description when the data files and any camera's video files disagree on the
+    episode count (dataset can't be migrated, e.g. 'All cams dont have same number of episodes'),
+    else None. Datasets without videos never mismatch here."""
+    root = Path(root)
+    info = json.loads((root / "meta" / "info.json").read_text())
+    counts = {"data": len(list((root / "data").glob("*/episode_*.parquet")))}
+    for k, f in info.get("features", {}).items():
+        if f.get("dtype") == "video":
+            counts[k] = len(list((root / "videos").glob(f"*/{k}/episode_*.mp4")))
+    if len(counts) > 1 and len(set(counts.values())) > 1:
+        return f"data/video episode counts disagree: {counts}"
+    return None
+
+
 def reconcile_episode_count(root) -> str | None:
     """When the data files and video files agree on an episode count N but the metadata lists a
     different count, rewrite the metadata (episodes.jsonl, episodes_stats.jsonl, info.json) to N.
diff --git a/community_v3_migration/run_migration.py b/community_v3_migration/run_migration.py
index 6a308ffb3..695b8b25c 100644
--- a/community_v3_migration/run_migration.py
+++ b/community_v3_migration/run_migration.py
@@ -17,7 +17,7 @@ from huggingface_hub import HfApi
 
 import so_arm_frame
 from classify import classify, is_end_effector, load_info
-from fix_dataset import fix_dataset_in_place, reconcile_episode_count
+from fix_dataset import data_video_episode_mismatch, fix_dataset_in_place, reconcile_episode_count
 
 SRC_REPO = "HuggingFaceVLA/community_dataset_v3"
 
@@ -168,6 +168,10 @@ def migrate_one(api, dst_repo, sub, work_dir, no_upload) -> dict:
     if is_end_effector(info):
         return {"root": sub, "robot_type": info.get("robot_type"),
                 "action": "skipped: end-effector (task-space) dataset, out of scope"}
+    mismatch = data_video_episode_mismatch(local)
+    if mismatch:
+        return {"root": sub, "robot_type": info.get("robot_type"),
+                "action": f"skipped: {mismatch}"}
 
     result = fix_dataset_in_place(local)          # SO-arm value fix (or structural_only)