diff --git a/src/styles/includes/preview.less b/src/styles/includes/preview.less
index 79483fe..fb90ab0 100644
--- a/src/styles/includes/preview.less
+++ b/src/styles/includes/preview.less
@@ -106,6 +106,11 @@ padding: 0px;
 	padding-bottom: 30px;
 }
 
+video, audio {
+  margin: 0 auto;
+  width: 100%;
+}
+
 .wrap {
   width: 40%;
   height: 40%;