Docblocks + changelog tweak

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Unreleased
 
 - HTML Purifier now allows `oembed` tags. ([ckeditor#59](https://github.com/craftcms/ckeditor/issues/59))
+- Added `craft\htmlpurifier\VideoEmbedUrlDef`.
 - Fixed a bug where entries that aren’t propagated to the primary site weren’t showing revision notes. ([#12641](https://github.com/craftcms/cms/issues/12641))
 - Fixed a bug where HTML tags weren’t getting stripped from auto-generated Handle and URI Format setting values.
 - Fixed a JavaScript error that could occur if an object with `null `values was passed to `Craft.compare()`.

src/htmlpurifier/VideoEmbedUrlDef.php

@@ -1,8 +1,21 @@
 <?php
+/**
+ * @link https://craftcms.com/
+ * @copyright Copyright (c) Pixel & Tonic, Inc.
+ * @license https://craftcms.github.io/license/
+ */
 
 namespace craft\htmlpurifier;
 
-class VideoEmbedUrlDef extends \HTMLPurifier_AttrDef_URI
+use HTMLPurifier_AttrDef_URI;
+
+/**
+ * Class VideoEmbedUrlDef
+ *
+ * @author Pixel & Tonic, Inc. <[email protected]>
+ * @since 3.7.66
+ */
+class VideoEmbedUrlDef extends HTMLPurifier_AttrDef_URI
 {
     public function validate($uri, $config, $context)
     {