diff --git a/README.md b/README.md
index cada088..15190a3 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ behind the scenes:
 ### 05.06.23
 
 <video>
-    <source src="cm2.mov">
+    <source src="cm2.mp4">
 </video>
 
 First prototype. It would be nice to add a part where to edit global css. It could come handy for defining animation for example.
diff --git a/cm2.mov b/cm2.mov
deleted file mode 100755
index 6d5fdde..0000000
Binary files a/cm2.mov and /dev/null differ
diff --git a/cm2.mp4 b/cm2.mp4
new file mode 100755
index 0000000..1ea3a66
Binary files /dev/null and b/cm2.mp4 differ