diff --git a/source/stylesheets/application.css.scss b/source/stylesheets/application.css.scss
index b9acf51..6c1d27d 100644
--- a/source/stylesheets/application.css.scss
+++ b/source/stylesheets/application.css.scss
@@ -86,3 +86,18 @@ figcaption {
   float: right;
   text-align: right;
 }
+
+// From https://www.ostraining.com/blog/coding/responsive-videos/
+.video-responsive {
+    overflow:hidden;
+    padding-bottom:56.25%;
+    position:relative;
+    height:0;
+}
+.video-responsive iframe {
+    left:0;
+    top:0;
+    height:100%;
+    width:100%;
+    position:absolute;
+}