Index: Gruntfile.js
===================================================================
--- Gruntfile.js	(revision 36743)
+++ Gruntfile.js	(working copy)
@@ -181,7 +181,8 @@
 				src: [
 					'wp-admin/css/*.css',
 					'!wp-admin/css/wp-admin*.css',
-					'wp-includes/css/*.css'
+					'wp-includes/css/*.css',
+					'wp-includes/js/mediaelement/wp-mediaelement.css'
 				]
 			},
 			rtl: {
@@ -323,6 +324,7 @@
 					// WordPress scripts inside directories
 					'wp-includes/js/jquery/jquery.table-hotkeys.js',
 					'wp-includes/js/mediaelement/wp-mediaelement.js',
+					'wp-includes/js/mediaelement/wp-playlist.js',
 					'wp-includes/js/plupload/handlers.js',
 					'wp-includes/js/plupload/wp-plupload.js',
 					'wp-includes/js/tinymce/plugins/wordpress/plugin.js',
@@ -439,6 +441,8 @@
 				src: [
 					'wp-admin/js/*.js',
 					'wp-includes/js/*.js',
+					'wp-includes/js/mediaelement/wp-mediaelement.js',
+					'wp-includes/js/mediaelement/wp-playlist.js',
 					'wp-includes/js/plupload/handlers.js',
 					'wp-includes/js/plupload/wp-plupload.js',
 					'wp-includes/js/tinymce/plugins/wordpress/plugin.js',
Index: src/wp-includes/script-loader.php
===================================================================
--- src/wp-includes/script-loader.php	(revision 36744)
+++ src/wp-includes/script-loader.php	(working copy)
@@ -345,7 +345,7 @@
 	) );
 
 
-	$scripts->add( 'wp-mediaelement', "/wp-includes/js/mediaelement/wp-mediaelement.js", array('mediaelement'), false, 1 );
+	$scripts->add( 'wp-mediaelement', "/wp-includes/js/mediaelement/wp-mediaelement$suffix.js", array('mediaelement'), false, 1 );
 	$mejs_settings = array(
 		'pluginPath' => includes_url( 'js/mediaelement/', 'relative' ),
 	);
@@ -361,7 +361,7 @@
 	);
 
 	$scripts->add( 'froogaloop',  "/wp-includes/js/mediaelement/froogaloop.min.js", array(), '2.0' );
-	$scripts->add( 'wp-playlist', "/wp-includes/js/mediaelement/wp-playlist.js", array( 'wp-util', 'backbone', 'mediaelement' ), false, 1 );
+	$scripts->add( 'wp-playlist', "/wp-includes/js/mediaelement/wp-playlist$suffix.js", array( 'wp-util', 'backbone', 'mediaelement' ), false, 1 );
 
 	$scripts->add( 'zxcvbn-async', "/wp-includes/js/zxcvbn-async$suffix.js", array(), '1.0' );
 	did_action( 'init' ) && $scripts->localize( 'zxcvbn-async', '_zxcvbnSettings', array(
@@ -762,7 +762,7 @@
 	$styles->add( 'imgareaselect',       '/wp-includes/js/imgareaselect/imgareaselect.css', array(), '0.9.8' );
 	$styles->add( 'wp-jquery-ui-dialog', "/wp-includes/css/jquery-ui-dialog$suffix.css", array( 'dashicons' ) );
 	$styles->add( 'mediaelement',        "/wp-includes/js/mediaelement/mediaelementplayer.min.css", array(), '2.18.1' );
-	$styles->add( 'wp-mediaelement',     "/wp-includes/js/mediaelement/wp-mediaelement.css", array( 'mediaelement' ) );
+	$styles->add( 'wp-mediaelement',     "/wp-includes/js/mediaelement/wp-mediaelement$suffix.css", array( 'mediaelement' ) );
 	$styles->add( 'thickbox',            '/wp-includes/js/thickbox/thickbox.css', array( 'dashicons' ) );
 
 	// Deprecated CSS