diff -r 3d4e9c994f10 -r a86126ab1dd4 wp/wp-includes/js/mediaelement/mediaelementplayer.css
--- a/wp/wp-includes/js/mediaelement/mediaelementplayer.css	Tue Oct 22 16:11:46 2019 +0200
+++ b/wp/wp-includes/js/mediaelement/mediaelementplayer.css	Tue Dec 15 13:49:49 2020 +0100
@@ -661,7 +661,7 @@
     list-style-type: none !important;
     margin: 0 0 6px;
     overflow: hidden;
-    padding: 0 10px;
+    padding: 0;
 }
 
 .mejs__captions-selector-list-item:hover,
@@ -685,7 +685,8 @@
     float: left;
     font-size: 10px;
     line-height: 15px;
-    padding: 4px 0 0;
+    padding: 4px 10px 0;
+    width: 100%;
 }
 
 .mejs__captions-selected,
@@ -749,6 +750,7 @@
 }
 .mejs__overlay-error > img {
     left: 0;
+    max-width: 100%;
     position: absolute;
     top: 0;
     z-index: -1;