Link related videos in Readme

Author: jjohannes

README.MD

@@ -34,6 +34,11 @@ If you plan to build Java Modules with Gradle, you should consider using these p
 [Here is a sample](https://github.com/gradlex-org/java-module-testing/tree/main/samples/use-all-java-module-plugins)
 that shows all plugins in combination.
 
+[In episodes 31, 32, 33 of Understanding Gradle](https://github.com/jjohannes/understanding-gradle) I explain what these plugins do and why they are needed.
+[<img src="https://onepiecesoftware.github.io/img/videos/31.png" width="260">](https://www.youtube.com/watch?v=X9u1taDwLSA&list=PLWQK2ZdV4Yl2k2OmC_gsjDpdIBTN0qqkE)
+[<img src="https://onepiecesoftware.github.io/img/videos/32.png" width="260">](https://www.youtube.com/watch?v=T9U0BOlVc-c&list=PLWQK2ZdV4Yl2k2OmC_gsjDpdIBTN0qqkE)
+[<img src="https://onepiecesoftware.github.io/img/videos/33.png" width="260">](https://www.youtube.com/watch?v=6rFEDcP8Noc&list=PLWQK2ZdV4Yl2k2OmC_gsjDpdIBTN0qqkE)
+
 [Full Java Module System Project Setup](https://github.com/jjohannes/gradle-project-setup-howto/tree/java_module_system) is a full-fledged Java Module System project setup using these plugins.  
 [<img src="https://onepiecesoftware.github.io/img/videos/15-3.png" width="260">](https://www.youtube.com/watch?v=uRieSnovlVc&list=PLWQK2ZdV4Yl2k2OmC_gsjDpdIBTN0qqkE)