diff --git a/_includes/autoplay_video.html b/_includes/autoplay_video.html
index 9539fe9..3e215ed 100644
--- a/_includes/autoplay_video.html
+++ b/_includes/autoplay_video.html
@@ -1,3 +1,3 @@
 <video autoplay loop muted>
-    <source src="{{ include.src }}" type="video/webm" />
+    <source src="{{ include.src }}" type="video/webm" style="width:100%;" />
 </video>