diff --git a/ui/src/styles/md-editor.scss b/ui/src/styles/md-editor.scss
index 68262c4f390..9e98f10dfe5 100644
--- a/ui/src/styles/md-editor.scss
+++ b/ui/src/styles/md-editor.scss
@@ -29,6 +29,7 @@
   }
   video {
     max-width: 360px !important;
+    width: 100%;
   }
   ul {
     list-style: circle;