diff --git a/readme.md b/readme.md
index b69c800..af8325f 100644
--- a/readme.md
+++ b/readme.md
@@ -28,9 +28,9 @@ For intel Mac, an easier way to get sensor infomation:
 
 
 
-## screen shot and screen record
-- screen record ->screen_record.mp4[1.4MB] 
-![screen record](https://raw.githubusercontent.com/fermion-star/apple_sensors/master/screen_record.mp4)
+## Demo: screen shot and screen record
+- screen record : screen_record.mp4[1.4MB] or
+![screen record](https://raw.githubusercontent.com/fermion-star/apple_sensors/master/screen_record.low.gif)
 
 - screen shot 
 ![screen shot](https://raw.githubusercontent.com/fermion-star/apple_sensors/master/screen_shot.png) 
diff --git a/screen_record.low.gif b/screen_record.low.gif
new file mode 100644
index 0000000..7d433e6
Binary files /dev/null and b/screen_record.low.gif differ