Update README.md

README.md

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 Use any file manager, or a tool like [Label Studio](https://labelstud.io/) for faster annotation.
 
+**Class Labeller**
+<div align="center">
+    <video src="assets/video/Labeling.mp4" title="Labeling.mp4" width="75%" controls></video>
+</div>
+
+
 ---
 
 ### Step 2 — Auto-label & Review