Docs: Add documentation for `header_video_settings` filter.

Props milana_cap.
Fixes #43300.
Built from https://develop.svn.wordpress.org/trunk@42707


git-svn-id: http://core.svn.wordpress.org/trunk@42535 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/theme.php

@@ -1467,6 +1467,13 @@ function get_header_video_settings() {
 		$settings['mimeType'] = $video_type['type'];
 	}
 
+	/**
+	 * Filters header video settings.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param array $settings An array of header video settings.
+	 */
 	return apply_filters( 'header_video_settings', $settings );
 }
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-42706';
+$wp_version = '5.0-alpha-42707';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.