Thanks

README.md

@@ -2,4 +2,45 @@
 
 ## Reference Documentation
 
-- [Subscribe to Push Notifications](https://developers.google.com/youtube/v3/guides/push_notifications)
+- [Subscribe to Push Notifications](https://developers.google.com/youtube/v3/guides/push_notifications)
+
+## Steps to subscribe to the feed
+
+- Go to [PubSubHubbub Hub](https://pubsubhubbub.appspot.com/subscribe)
+- Enter the following details:
+  - Callback URL: We used [https://youtube-listener.javagrunt.com/]
+  - Topic URL: https://www.youtube.com/xml/feeds/videos.xml?channel_id=YOUR_CHANNEL_ID
+  - Mode: Subscribe
+
+## Example XML
+
+```xml
+<?xml version='1.0' encoding='UTF-8'?>
+<feed
+	xmlns:yt="http://www.youtube.com/xml/schemas/2015"
+	xmlns="http://www.w3.org/2005/Atom">
+	<link rel="hub" href="https://pubsubhubbub.appspot.com"/>
+	<link rel="self" href="https://www.youtube.com/xml/feeds/videos.xml?channel_id=UCuGoHRQbVXa4LxepmPOdUfQ"/>
+	<title>YouTube video feed</title>
+	<updated>2023-12-16T20:59:59.795258257+00:00</updated>
+	<entry>
+		<id>yt:video:CTv7TyuQn-s</id>
+		<yt:videoId>CTv7TyuQn-s</yt:videoId>
+		<yt:channelId>UCuGoHRQbVXa4LxepmPOdUfQ</yt:channelId>
+		<title>Spring Boot, YouTube Listener, then YouTube Analysis with Spring AI</title>
+		<link rel="alternate" href="https://www.youtube.com/watch?v=CTv7TyuQn-s"/>
+		<author>
+			<name>DaShaun</name>
+			<uri>https://www.youtube.com/channel/UCuGoHRQbVXa4LxepmPOdUfQ</uri>
+		</author>
+		<published>2023-12-15T22:15:34+00:00</published>
+		<updated>2023-12-16T20:59:59.795258257+00:00</updated>
+	</entry>
+</feed>
+``` 
+
+## Thanks you!
+
+Thank you [Jonas](https://github.com/Bjoggis-Studios) for the help!
+
+[The blog he found that pointed to the fix!](https://kevincox.ca/2021/12/16/youtube-websub/#wrong-topic-url)