Adds YouTube CTA.

Author: Simon Prickett

README.md

@@ -69,3 +69,8 @@ To rebuild the application without running the tests:
 ```
 mvn package -DskipTests 
 ```
+
+Subscribe to our YouTube Channel
+---
+
+We'd love for you to [check out our YouTube channel](https://youtube.com/redislabs), and subscribe if you want to see more Redis videos!