Index: src/wp-includes/js/mediaelement/wp-mediaelement.css
===================================================================
--- src/wp-includes/js/mediaelement/wp-mediaelement.css	(revision 28170)
+++ src/wp-includes/js/mediaelement/wp-mediaelement.css	(working copy)
@@ -142,6 +142,11 @@
 	line-height: 1.5;
 }
 
+.rtl .wp-playlist-item-length {
+	left: 3px;
+	right: auto;
+}
+
 .wp-playlist-tracks {
 	margin-top: 10px;
 }
@@ -195,6 +200,12 @@
 	border: 0;
 }
 
+.rtl .wp-playlist .wp-playlist-current-item img {
+	float: right;
+	margin-left: 10px;
+	margin-right: 0;
+}
+
 .wp-playlist-current-item .wp-playlist-item-title,
 .wp-playlist-current-item .wp-playlist-item-artist {
 	overflow: hidden;