diff --git a/README.md b/README.md
index 8603aa1..0509879 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ Edit the python script to stop the minions wave !
 
 <!-- * [Screencast : CodeTower - Gameplay](https://www.youtube.com/watch?v=snZaTSre8FA) -->
 
-[![CodeTower - Gameplay](img/screen-04.png)](https://www.youtube.com/watch?v=snZaTSre8FA "CodeTower - Gameplay")
+[![CodeTower - Gameplay](img/screen-04-ytb.png)](https://www.youtube.com/watch?v=snZaTSre8FA "CodeTower - Gameplay")
 
 <!-- [![CodeTower - Gameplay](https://img.youtube.com/vi/snZaTSre8FA/0.jpg)](https://www.youtube.com/watch?v=snZaTSre8FA "CodeTower - Gameplay") -->
 
@@ -32,7 +32,7 @@ Assets (3D models, sounds, icons) : [Kenney]( https://www.kenney.nl/ ) and [Kayl
 
 ### Python script
 
-The Python script is the file **ct_cmd.py** (in the game folder), you have to edit it with your favorite editing software (Spyder, Emacs, Atom, ...).
+The Python script is the file **"ct_cmd.py"** (in the game folder), you have to edit it with your favorite editing software (Spyder, Emacs, Atom, ...).
 
 ### Map commands 
 
diff --git a/img/screen-04-ytb.png b/img/screen-04-ytb.png
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