diff --git a/868-mhz/index.html b/868-mhz/index.html
index 892589b..622c764 100644
--- a/868-mhz/index.html
+++ b/868-mhz/index.html
@@ -93,7 +93,7 @@
 </header>
 <section id='main'>
 <video class="fullscreen-video" id="myVideo" autoplay="autoplay" muted loop>
-    <source src="img/bg.mp4">   
+    <source src="img/bg.m4v">   
 </video>
 <div id="galleries">
 <div id='work'>