add teaser

README.md

@@ -1,6 +1,10 @@
-# Toward Universal Mesh Movement Networks
+# Towards Universal Mesh Movement Networks
 
 placeholder for a teaser (can be a flow-past-cylinders)
+<p align="center">
+  <img src="https://erizmr.github.io/UM2N/static/videos/UM2N_video.mp4" width="85%" height="85%" /><br>
+  <em>UM2N(Universal Mesh Movement Networks) performs mesh adaptation for different PDEs and scenarios without re-training.</em>
+</p>
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