diff --git a/wp-includes/js/mediaelement/wp-mediaelement.css b/wp-includes/js/mediaelement/wp-mediaelement.css
index c9a814ed2b..38a91e69a4 100644
--- a/wp-includes/js/mediaelement/wp-mediaelement.css
+++ b/wp-includes/js/mediaelement/wp-mediaelement.css
@@ -1,3 +1,10 @@
+#wpview-iframe-sandbox {
+	color: #444;
+	font-family: "Open Sans", sans-serif;
+	font-size: 13px;
+	line-height: 1.4em;
+}
+
 .mejs-container {
 	clear: both;
 }
diff --git a/wp-includes/media.php b/wp-includes/media.php
index f9ffc6f3c8..af8d938ca3 100644
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -3310,6 +3310,7 @@ function attachment_url_to_postid( $url ) {
  */
 function wpview_media_sandbox_styles() {
  	$version = 'ver=' . $GLOBALS['wp_version'];
+	$open_sans = "//fonts.googleapis.com/css?family=Open+Sans%3A300italic%2C400italic%2C600italic%2C300%2C400%2C600&subset=latin%2Clatin-ext&ver=$version";
 	$dashicons = includes_url( "css/dashicons.css?$version" );
  	$mediaelement = includes_url( "js/mediaelement/mediaelementplayer.min.css?$version" );
  	$wpmediaelement = includes_url( "js/mediaelement/wp-mediaelement.css?$version" );
@@ -3323,5 +3324,5 @@ function wpview_media_sandbox_styles() {
 	 *
 	 * @param array The URLs to the stylesheets that will be loaded in the sandbox iframe.
 	 */
-	return apply_filters( 'wpview_media_sandbox_styles', array( $dashicons, $mediaelement, $wpmediaelement ) );
+	return apply_filters( 'wpview_media_sandbox_styles', array( $open_sans, $dashicons, $mediaelement, $wpmediaelement ) );
 }