Index: Gruntfile.js
===================================================================
--- Gruntfile.js	(revision 32108)
+++ Gruntfile.js	(working copy)
@@ -4,7 +4,7 @@
 		SOURCE_DIR = 'src/',
 		BUILD_DIR = 'build/',
 		mediaConfig = {},
-		mediaBuilds = ['audio-video', 'grid', 'models', 'views'];
+		mediaBuilds = ['audiovideo', 'grid', 'models', 'views'];
 
 	// Load tasks.
 	require('matchdep').filterDev(['grunt-*', '!grunt-legacy-util']).forEach( grunt.loadNpmTasks );
@@ -12,9 +12,9 @@
 	grunt.util = require('grunt-legacy-util');
 
 	mediaBuilds.forEach( function ( build ) {
-		var path = SOURCE_DIR + 'wp-includes/js/media/';
+		var path = SOURCE_DIR + 'wp-includes/js/media';
 		mediaConfig[ build ] = { files : {} };
-		mediaConfig[ build ].files[ path + build + '.js' ] = [ path + build + '.manifest.js' ];
+		mediaConfig[ build ].files[ path + '-' + build + '.js' ] = [ path + '/' + build + '.manifest.js' ];
 	} );
 
 	// Project configuration.
@@ -62,6 +62,7 @@
 						cwd: SOURCE_DIR,
 						src: [
 							'**',
+							'!wp-includes/js/media/**',
 							'!**/.{svn,git}/**', // Ignore version control directories.
 							// Ignore unminified versions of external libs we don't ship:
 							'!wp-includes/js/backbone.js',
@@ -272,12 +273,8 @@
 				options: {
 					browserify: true
 				},
-				expand: true,
-				cwd: SOURCE_DIR,
 				src: [
-					'wp-includes/js/media/**/*.js',
-					'!wp-includes/js/media/*.js',
-					'wp-includes/js/media/*.manifest.js'
+					SOURCE_DIR + 'wp-includes/js/media/**/*.js'
 				]
 			},
 			core: {
@@ -286,6 +283,8 @@
 				src: [
 					'wp-admin/js/*.js',
 					'wp-includes/js/*.js',
+					// Built scripts.
+					'!wp-includes/js/media-*',
 					// WordPress scripts inside directories
 					'wp-includes/js/jquery/jquery.table-hotkeys.js',
 					'wp-includes/js/mediaelement/wp-mediaelement.js',
@@ -628,9 +627,7 @@
 		'rtl',
 		'cssmin:rtl',
 		'cssmin:colors',
-		'browserify',
 		'uglify:core',
-		'uglify:media',
 		'uglify:jqueryui',
 		'concat:tinymce',
 		'compress:tinymce',
Index: src/wp-admin/includes/update-core.php
===================================================================
--- src/wp-admin/includes/update-core.php	(revision 32108)
+++ src/wp-admin/includes/update-core.php	(working copy)
@@ -694,16 +694,7 @@
 'wp-includes/js/jquery/ui/jquery.ui.tabs.min.js',
 'wp-includes/js/jquery/ui/jquery.ui.tooltip.min.js',
 'wp-includes/js/jquery/ui/jquery.ui.widget.min.js',
-'wp-includes/js/tinymce/skins/wordpress/images/dashicon-no-alt.png',
-// 4.2
-'wp-includes/js/media-audiovideo.js',
-'wp-includes/js/media-audiovideo.min.js',
-'wp-includes/js/media-grid.js',
-'wp-includes/js/media-grid.min.js',
-'wp-includes/js/media-models.js',
-'wp-includes/js/media-models.min.js',
-'wp-includes/js/media-views.js',
-'wp-includes/js/media-views.min.js',
+'wp-includes/js/tinymce/skins/wordpress/images/dashicon-no-alt.png'
 );
 
 /**
Index: src/wp-includes/script-loader.php
===================================================================
--- src/wp-includes/script-loader.php	(revision 32108)
+++ src/wp-includes/script-loader.php	(working copy)
@@ -410,7 +410,7 @@
 	$scripts->add( 'accordion', "/wp-admin/js/accordion$suffix.js", array( 'jquery' ), false, 1 );
 
 	$scripts->add( 'shortcode', "/wp-includes/js/shortcode$suffix.js", array( 'underscore' ), false, 1 );
-	$scripts->add( 'media-models', "/wp-includes/js/media/models$suffix.js", array( 'wp-backbone' ), false, 1 );
+	$scripts->add( 'media-models', "/wp-includes/js/media-models$suffix.js", array( 'wp-backbone' ), false, 1 );
 	did_action( 'init' ) && $scripts->localize( 'media-models', '_wpMediaModelsL10n', array(
 		'settings' => array(
 			'ajaxurl' => admin_url( 'admin-ajax.php', 'relative' ),
@@ -420,9 +420,9 @@
 
 	// To enqueue media-views or media-editor, call wp_enqueue_media().
 	// Both rely on numerous settings, styles, and templates to operate correctly.
-	$scripts->add( 'media-views',  "/wp-includes/js/media/views$suffix.js",  array( 'utils', 'media-models', 'wp-plupload', 'jquery-ui-sortable', 'wp-mediaelement' ), false, 1 );
+	$scripts->add( 'media-views',  "/wp-includes/js/media-views$suffix.js",  array( 'utils', 'media-models', 'wp-plupload', 'jquery-ui-sortable', 'wp-mediaelement' ), false, 1 );
 	$scripts->add( 'media-editor', "/wp-includes/js/media-editor$suffix.js", array( 'shortcode', 'media-views' ), false, 1 );
-	$scripts->add( 'media-audiovideo', "/wp-includes/js/media/audio-video$suffix.js", array( 'media-editor' ), false, 1 );
+	$scripts->add( 'media-audiovideo', "/wp-includes/js/media-audiovideo$suffix.js", array( 'media-editor' ), false, 1 );
 	$scripts->add( 'mce-view', "/wp-includes/js/mce-view$suffix.js", array( 'shortcode', 'media-models', 'media-audiovideo', 'wp-playlist' ), false, 1 );
 
 	if ( is_admin() ) {
@@ -556,7 +556,7 @@
 
 		$scripts->add( 'list-revisions', "/wp-includes/js/wp-list-revisions$suffix.js" );
 
-		$scripts->add( 'media-grid', "/wp-includes/js/media/grid$suffix.js", array( 'media-editor' ), false, 1 );
+		$scripts->add( 'media-grid', "/wp-includes/js/media-grid$suffix.js", array( 'media-editor' ), false, 1 );
 		$scripts->add( 'media', "/wp-admin/js/media$suffix.js", array( 'jquery' ), false, 1 );
 		did_action( 'init' ) && $scripts->localize( 'media', 'attachMediaBoxL10n', array(
 			'error' => __( 'An error has occurred. Please reload the page and try again.' ),