diff --git a/src/wp-admin/edit-form-advanced.php b/src/wp-admin/edit-form-advanced.php
index 5b5abb0ccf..0724a88c71 100644
--- a/src/wp-admin/edit-form-advanced.php
+++ b/src/wp-admin/edit-form-advanced.php
@@ -213,7 +213,7 @@ if ( post_type_supports($post_type, 'page-attributes') )
 	add_meta_box('pageparentdiv', 'page' == $post_type ? __('Page Attributes') : __('Attributes'), 'page_attributes_meta_box', null, 'side', 'core');
 
 if ( $thumbnail_support && current_user_can( 'upload_files' ) )
-	add_meta_box('postimagediv', __('Featured Image'), 'post_thumbnail_meta_box', null, 'side', 'low');
+	add_meta_box('postimagediv', esc_html( $post_type_object->labels->featured_image ), 'post_thumbnail_meta_box', null, 'side', 'low');
 
 if ( post_type_supports($post_type, 'excerpt') )
 	add_meta_box('postexcerpt', __('Excerpt'), 'post_excerpt_meta_box', null, 'normal', 'core');
@@ -371,7 +371,8 @@ if ( 'post' == $post_type ) {
 	}
 
 	if ( current_theme_supports( 'post-thumbnails' ) && post_type_supports( 'post', 'thumbnail' ) ) {
-		$publish_box .= '<li>' . __('<strong>Featured Image</strong> - This allows you to associate an image with your post without inserting it. This is usually useful only if your theme makes use of the featured image as a post thumbnail on the home page, a custom header, etc.') . '</li>';
+		/* translators: %s: Featured Image */
+		$publish_box .= '<li>' . sprintf( __( '<strong>%s</strong> - This allows you to associate an image with your post without inserting it. This is usually useful only if your theme makes use of the image as a post thumbnail on the home page, a custom header, etc.' ), esc_html( $post_type_object->labels->featured_image ) ) . '</li>';
 	}
 
 	$publish_box .= '</ul>';
diff --git a/src/wp-admin/includes/media.php b/src/wp-admin/includes/media.php
index bb3b4a079c..cf1beb6d8d 100644
--- a/src/wp-admin/includes/media.php
+++ b/src/wp-admin/includes/media.php
@@ -1493,8 +1493,12 @@ function get_media_item( $attachment_id, $args = null ) {
 	}
 	if ( 'image' == $type && $calling_post_id && current_theme_supports( 'post-thumbnails', get_post_type( $calling_post_id ) )
 		&& post_type_supports( get_post_type( $calling_post_id ), 'thumbnail' ) && get_post_thumbnail_id( $calling_post_id ) != $attachment_id ) {
+		
+		$calling_post = get_post( $calling_post_id );
+		$calling_post_type_object = get_post_type_object( $calling_post->post_type );
+
 		$ajax_nonce = wp_create_nonce( "set_post_thumbnail-$calling_post_id" );
-		$thumbnail = "<a class='wp-post-thumbnail' id='wp-post-thumbnail-" . $attachment_id . "' href='#' onclick='WPSetAsThumbnail(\"$attachment_id\", \"$ajax_nonce\");return false;'>" . esc_html__( "Use as featured image" ) . "</a>";
+		$thumbnail = "<a class='wp-post-thumbnail' id='wp-post-thumbnail-" . $attachment_id . "' href='#' onclick='WPSetAsThumbnail(\"$attachment_id\", \"$ajax_nonce\");return false;'>" . esc_html( $calling_post_type_object->labels->use_featured_image ) . "</a>";
 	}
 
 	if ( ( $r['send'] || $thumbnail || $delete ) && !isset( $form_fields['buttons'] ) ) {
@@ -1736,8 +1740,16 @@ function get_compat_media_markup( $attachment_id, $args = null ) {
  * @since 2.5.0
  */
 function media_upload_header() {
+
 	$post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0;
-	echo '<script type="text/javascript">post_id = ' . $post_id . ";</script>\n";
+
+	if ( ! empty( $post_id ) ) { 
+		$post_type = get_post_type( $post_id ); 
+	} else {
+		$post_type = ''; 
+	} 
+
+	echo '<script type="text/javascript">post_id = ' . $post_id . ';post_type = ' . $post_type . ';</script>';
 	if ( empty( $_GET['chromeless'] ) ) {
 		echo '<div id="media-upload-header">';
 		the_media_upload_tabs();
diff --git a/src/wp-admin/includes/post.php b/src/wp-admin/includes/post.php
index 5ef3ce88e8..4916d13998 100644
--- a/src/wp-admin/includes/post.php
+++ b/src/wp-admin/includes/post.php
@@ -1362,11 +1362,16 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
 function _wp_post_thumbnail_html( $thumbnail_id = null, $post = null ) {
 	global $content_width, $_wp_additional_image_sizes;
 
-	$post = get_post( $post );
+	$post               = get_post( $post );
+	$post_type_object   = get_post_type_object( $post->post_type );
+	$set_thumbnail_link = '<p class="hide-if-no-js"><a title="%s" href="%s" id="set-post-thumbnail" class="thickbox">%s</a></p>';
+	$upload_iframe_src  = get_upload_iframe_src( 'image', $post->ID );
 
-	$upload_iframe_src = esc_url( get_upload_iframe_src('image', $post->ID ) );
-	$set_thumbnail_link = '<p class="hide-if-no-js"><a title="' . esc_attr__( 'Set featured image' ) . '" href="%s" id="set-post-thumbnail" class="thickbox">%s</a></p>';
-	$content = sprintf( $set_thumbnail_link, $upload_iframe_src, esc_html__( 'Set featured image' ) );
+	$content = sprintf( $set_thumbnail_link,
+		esc_attr( $post_type_object->labels->set_featured_image ),
+		esc_url( $upload_iframe_src ),
+		esc_html( $post_type_object->labels->set_featured_image )
+	);
 
 	if ( $thumbnail_id && get_post( $thumbnail_id ) ) {
 		$old_content_width = $content_width;
@@ -1377,8 +1382,12 @@ function _wp_post_thumbnail_html( $thumbnail_id = null, $post = null ) {
 			$thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'post-thumbnail' );
 		if ( !empty( $thumbnail_html ) ) {
 			$ajax_nonce = wp_create_nonce( 'set_post_thumbnail-' . $post->ID );
-			$content = sprintf( $set_thumbnail_link, $upload_iframe_src, $thumbnail_html );
-			$content .= '<p class="hide-if-no-js"><a href="#" id="remove-post-thumbnail" onclick="WPRemoveThumbnail(\'' . $ajax_nonce . '\');return false;">' . esc_html__( 'Remove featured image' ) . '</a></p>';
+			$content = sprintf( $set_thumbnail_link,
+				esc_attr( $post_type_object->labels->set_featured_image ),
+				esc_url( $upload_iframe_src ),
+				$thumbnail_html
+			);
+			$content .= '<p class="hide-if-no-js"><a href="#" id="remove-post-thumbnail" onclick="WPRemoveThumbnail(\'' . $ajax_nonce . '\');return false;">' . esc_html( $post_type_object->labels->remove_featured_image ) . '</a></p>';
 		}
 		$content_width = $old_content_width;
 	}
diff --git a/src/wp-admin/js/set-post-thumbnail.js b/src/wp-admin/js/set-post-thumbnail.js
index 68abbcc830..fb17351a25 100644
--- a/src/wp-admin/js/set-post-thumbnail.js
+++ b/src/wp-admin/js/set-post-thumbnail.js
@@ -9,7 +9,8 @@ function WPSetAsThumbnail( id, nonce ) {
 		action: 'set-post-thumbnail', post_id: post_id, thumbnail_id: id, _ajax_nonce: nonce, cookie: encodeURIComponent( document.cookie )
 	}, function(str){
 		var win = window.dialogArguments || opener || parent || top;
-		$link.text( setPostThumbnailL10n.setThumbnail );
+		setThumbnail = 'setThumbnail_' + post_type;
+		$link.text( setPostThumbnailL10n[ setThumbnail ] ); 
 		if ( str == '0' ) {
 			alert( setPostThumbnailL10n.error );
 		} else {
diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index 352c7b2f6f..27a9e1d1f1 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -2313,6 +2313,7 @@ function wp_maybe_load_embeds() {
 	}
 
 	wp_embed_register_handler( 'youtube_embed_url', '#https?://(www.)?youtube\.com/embed/([^/]+)#i', 'wp_embed_handler_youtube' );
+	wp_embed_register_handler( 'youtube_v_url', '#https?://(www.)?youtube\.com/v/([^/]+)#i', 'wp_embed_handler_youtube' );
 
 	wp_embed_register_handler( 'googlevideo', '#http://video\.google\.([A-Za-z.]{2,5})/videoplay\?docid=([\d-]+)(.*?)#i', 'wp_embed_handler_googlevideo' );
 
@@ -3008,6 +3009,8 @@ function wp_enqueue_media( $args = array() ) {
 
 	$hier = $post && is_post_type_hierarchical( $post->post_type );
 
+	$post_type_object = get_post_type_object( $post->post_type );
+
 	$strings = array(
 		// Generic
 		'url'         => __( 'URL' ),
@@ -3066,8 +3069,8 @@ function wp_enqueue_media( $args = array() ) {
 		'insertFromUrlTitle' => __( 'Insert from URL' ),
 
 		// Featured Images
-		'setFeaturedImageTitle' => __( 'Set Featured Image' ),
-		'setFeaturedImage'    => __( 'Set featured image' ),
+		'setFeaturedImageTitle' => $post_type_object->labels->featured_image,
+		'setFeaturedImage'      => $post_type_object->labels->set_featured_image,
 
 		// Gallery
 		'createGalleryTitle' => __( 'Create Gallery' ),
diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 180513f254..451e29f596 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -1624,12 +1624,17 @@ function _post_type_meta_capabilities( $capabilities = null ) {
  * - parent_item_colon - This string isn't used on non-hierarchical types. In hierarchical
  *                       ones the default is 'Parent Page:'.
  * - all_items - String for the submenu. Default is All Posts/All Pages.
+ * - featured_image - Default is Featured Image.
+ * - set_featured_image - Default is Set featured image.
+ * - remove_featured_image - Default is Remove featured image.
+ * - use_featured_image - Default is Use as featured image.
  * - menu_name - Default is the same as `name`.
  *
  * Above, the first default value is for non-hierarchical post types (like posts)
  * and the second one is for hierarchical post types (like pages).
  *
  * @since 3.0.0
+ * @since 4.3.0 Added the `featured_image`, `set_featured_image`, `remove_featured_image`, and `use_featured_image` labels.
  * @access private
  *
  * @param object $post_type_object Post type object.
@@ -1648,7 +1653,11 @@ function get_post_type_labels( $post_type_object ) {
 		'not_found' => array( __('No posts found.'), __('No pages found.') ),
 		'not_found_in_trash' => array( __('No posts found in Trash.'), __('No pages found in Trash.') ),
 		'parent_item_colon' => array( null, __('Parent Page:') ),
-		'all_items' => array( __( 'All Posts' ), __( 'All Pages' ) )
+		'all_items' => array( __( 'All Posts' ), __( 'All Pages' ) ),
+		'featured_image' => array( __( 'Featured Image' ), __( 'Featured Image' ) ),
+		'set_featured_image' => array( __( 'Set featured image' ), __( 'Set featured image' ) ),
+		'remove_featured_image' => array( __( 'Remove featured image' ), __( 'Remove featured image' ) ),
+		'use_featured_image' => array( __( 'Use as featured image' ), __( 'Use as featured image' ) ),
 	);
 	$nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name'];
 
diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index 6cd361b5d3..991e78e13e 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -570,13 +570,20 @@ function wp_default_scripts( &$scripts ) {
 			'error' => __( 'Could not load the preview image. Please reload the page and try again.' )
 		));
 
-		$scripts->add( 'set-post-thumbnail', "/wp-admin/js/set-post-thumbnail$suffix.js", array( 'jquery' ), false, 1 );
-		did_action( 'init' ) && $scripts->localize( 'set-post-thumbnail', 'setPostThumbnailL10n', array(
-			'setThumbnail' => __( 'Use as featured image' ),
+		$setPostThumbnailL10n = array(
+			'setThumbnail' => __( 'Use as featured image' ), // Back compat
 			'saving' => __( 'Saving...' ),
 			'error' => __( 'Could not set that as the thumbnail image. Try a different attachment.' ),
 			'done' => __( 'Done' )
-		) );
+		);
+
+		foreach ( get_post_types( null, 'objects' ) as $post_type_object ) {
+			if ( isset( $post_type_object->labels->use_featured_image ) ) {
+				$setPostThumbnailL10n[ "setThumbnail_{$post_type_object->name}" ] = $post_type_object->labels->use_featured_image;
+			}
+		}
+		$scripts->add( 'set-post-thumbnail', "/wp-admin/js/set-post-thumbnail$suffix.js", array( 'jquery' ), false, 1 );
+		did_action( 'init' ) && $scripts->localize( 'set-post-thumbnail', 'setPostThumbnailL10n', $setPostThumbnailL10n );
 
 		// Navigation Menus
 		$scripts->add( 'nav-menu', "/wp-admin/js/nav-menu$suffix.js", array( 'jquery-ui-sortable', 'jquery-ui-draggable', 'jquery-ui-droppable', 'wp-lists', 'postbox' ) );