Index: wp-content/themes/twentyfourteen/css/editor-style.css
===================================================================
--- wp-content/themes/twentyfourteen/css/editor-style.css	(revision 27624)
+++ wp-content/themes/twentyfourteen/css/editor-style.css	(working copy)
@@ -14,7 +14,9 @@
  * 5.0 - Alignment
  * 6.0 - Tables
  * 7.0 - Images
- * 8.0 - RTL
+ * 8.0 - Galleries
+ * 9.0 - Audio/Video
+ * 10.0 - RTL
  * ----------------------------------------------------------------------------
  */
 
@@ -423,10 +425,45 @@
 
 
 /**
- * 8.0 RTL
+ * 9.0 Audio/Video
  * ----------------------------------------------------------------------------
  */
 
+.mejs-mediaelement,
+.mejs-container .mejs-controls {
+	background: #000;
+}
+
+.mejs-controls .mejs-time-rail .mejs-time-loaded,
+.mejs-controls .mejs-horizontal-volume-slider .mejs-horizontal-volume-current {
+	background: #fff;
+}
+
+.mejs-controls .mejs-time-rail .mejs-time-current {
+	background: #24890d;
+}
+
+.mejs-controls .mejs-time-rail .mejs-time-total,
+.mejs-controls .mejs-horizontal-volume-slider .mejs-horizontal-volume-total {
+	background: rgba(255,255,255,.33);
+}
+
+.mejs-controls .mejs-time-rail span,
+.mejs-controls .mejs-horizontal-volume-slider .mejs-horizontal-volume-total,
+.mejs-controls .mejs-horizontal-volume-slider .mejs-horizontal-volume-current {
+	border-radius: 0;
+}
+
+.mejs-overlay-loading {
+	background: transparent;
+}
+
+
+/**
+ * 10.0 RTL
+ * ----------------------------------------------------------------------------
+ */
+
 html .mceContentBody.rtl {
 	direction: rtl;
 	unicode-bidi: embed;