Update README.md

Author: Heed725

README.md

@@ -69,6 +69,11 @@ pip3 install --user xarray rioxarray numpy netCDF4 dask
    * TIME_INDEX = `-1` for all months (multiband), or `1–12` for a single month
 4. Click **Run** → A clipped GeoTIFF is downloaded, processed, and added to the map.
 
+---
+## Video Tutorial
+
+https://youtu.be/IqF5fW00lWU?si=TjLjWCiLSusx5QcQ
+
 ---
 
 ## 📖 Data Source