Make the About video responsive.

fixes #24832 for trunk.

git-svn-id: https://develop.svn.wordpress.org/trunk@24952 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/about.php

@@ -53,10 +53,6 @@ include( ABSPATH . 'wp-admin/admin-header.php' );
 		<p></p>
 		<p><?php _e( 'From the first word you write, WordPress saves every change. Each revision is always at your fingertips. Text is highlighted as you scroll through revisions at lightning speed, so you can see what changes have been made along the way.' ); ?></p>
 		<p><?php _e( 'It&#8217;s easy to compare two revisions from any point in time, and to restore a revision and go back to writing. Now you can be confident that no mistake is permanent.' ); ?></p>
-
-
-
-
 	</div>
 
 	<div class="feature-section col two-col">

wp-admin/css/wp-admin.css

@@ -5881,6 +5881,10 @@ h2 .nav-tab {
 	border-radius: 3px;
 }
 
+.about-wrap .feature-section .video video {
+	max-width: 100%;
+}
+
 .about-wrap .feature-section.three-col img {
 	margin: 0.5em 0 0.5em 5px;
 	max-width: 100%;