changes to geo/app page. Added images

geo_app.md

@@ -25,7 +25,10 @@ Our research into digital geometry and appearance is method oriented and applica
 - Emergent phenomena in complex, dynamic systems composed of simpler entities. 
 - Digital master: modelling the shape and appearance of a product before manufacturing with applications to quality assessment.
   
-[![3D Modelling in VR](images/VR_modelling.png)](video/VR_modelling.m4v)
+<video width=640 height=360 controls>
+  <source src="video/VR_modelling.m4v" type="video/mp4">
+  ![3D Modelling in VR](images/VR_modelling.png) 
+</video>
 
 ## Digital Twins
 ![Oak tree reconstructed from LiDAR scan using skeletonization. Scan courtesy of Ebba Dellwik, DTU Wind](images/oak_27_4_2020_small.png) ![3D Scanned seal skull](images/seal_skull_small.png)