Readme update

README.md

@@ -2,15 +2,21 @@
 
 **Code your tower (coding tower defense)**
 
-CodeTower is a Tower Defense coding game where the towers are driven by Python code. 
+CodeTower is a Tower Defense coding game where the towers are driven by Python code (with your favorite editing software).
 
-* [Screencast](http://www.phroy.org/cloud/index.php/s/djBtGFSXBfCFJM7)
+Edit the python script to stop the minions wave !
+
+![Screenshot](img/screen-04.jpg) 
+
+* [![CodeTower - Gameplay](https://img.youtube.com/vi/snZaTSre8FA/0.jpg)](https://www.youtube.com/watch?v=snZaTSre8FA)
+
+<!-- * [Screencast](http://www.phroy.org/cloud/index.php/s/djBtGFSXBfCFJM7) -->
 
 It's a early prototype. CodeTower is a open source software distributed under the terms of the [GPLv3 license]('https://www.gnu.org/licenses/gpl-3.0.html').
 
 The game engine is [Blender](https://blender.org) / [UPGE](https://upbge.org).
 
-![Screenshot](img/screenshot-01.jpg) 
+Assets (3D models, sounds, icons) : [Kenney]( https://www.kenney.nl/ ) and [Kaylousberg](https://www.kaylousberg.com).
 
 ### Download