Index: wp-content/themes/twentythirteen/functions.php
===================================================================
--- wp-content/themes/twentythirteen/functions.php	(revision 23789)
+++ wp-content/themes/twentythirteen/functions.php	(working copy)
@@ -577,3 +577,55 @@
  * Adds support for a custom header image.
  */
 require( get_template_directory() . '/inc/custom-header.php' );
+
+/**
+ * Echoes the first found video from current post.
+ *
+ * @uses twentythirteen_get_first_post_video
+ *
+ * @print string HTML
+ */
+function twentythirteen_first_post_video() {
+	$first_video = twentythirteen_get_first_post_video();
+
+	if ( ! empty( $first_video ) )
+		echo apply_filters( 'the_content', $first_video );
+}
+
+/**
+ * Finds first video from a given post.
+ *
+ * 1. Tries for a video source element in post content.
+ * 2. Tries for a video embed in post content.
+ * 3. Tries for an attached video.
+ *
+ * @todo If content_ or embedded_ are true, make sure the post content gets filtered without the video
+ *
+ * @param object $post
+ * @return string Video URL
+ */
+function twentythirteen_get_first_post_video() {
+	global $post;
+
+	$the_content = $post->post_content;
+	$first_video = '';
+
+	$content_video = get_content_video( $the_content, true );
+	// @todo If valid, need to make sure the_content gets filtered without the video
+	
+	if ( ! empty( $content_video ) )
+		$post->post_content = $the_content;
+
+	if ( empty( $content_video ) ) {
+		$first_video = get_embedded_video( $the_content, true );
+		// @todo If valid, need to make sure the_content gets filtered without the video
+
+		if ( empty( $first_video ) )
+			$first_video = get_attached_video( $post );
+	}
+
+	if ( is_array( $first_video ) )
+		$first_video = $first_video[0];
+
+	return $first_video;
+}
\ No newline at end of file
Index: wp-content/themes/twentythirteen/content-video.php
===================================================================
--- wp-content/themes/twentythirteen/content-video.php	(revision 23789)
+++ wp-content/themes/twentythirteen/content-video.php	(working copy)
@@ -10,6 +10,8 @@
 
 <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
 	<header class="entry-header">
+		<?php twentythirteen_first_post_video(); ?>
+
 		<?php if ( is_single() ) : ?>
 		<h1 class="entry-title"><?php the_title(); ?></h1>
 		<?php else : ?>