diff --git a/README.md b/README.md
index 348ec79..d256554 100644
--- a/README.md
+++ b/README.md
@@ -584,6 +584,9 @@ For instance, take into account the snaptshot above. If you already know how to
           * [Introduction to Terraform](https://www.youtube.com/watch?v=h970ZBgKINg) 📼 🆓
           * [Infrastructure as Code in the Real World?](https://www.youtube.com/watch?v=S6vS5mzivFo) 📼 🆓
           * [Terraform: Up and Running](https://learning.oreilly.com/library/view/terraform-up-and/9781491977071/) 📕 💰
+          * Internals
+            * Build your own provider
+              * [How to build a Usable Terraform Provider in 20 hours](https://www.youtube.com/watch?v=OoSAepwT0l4) 🆓 📼
         * [CDK - CloudFormation Development Kit](https://docs.aws.amazon.com/cdk/latest/guide/home.html)
           * [Infrastructure is Code with CDK](https://www.youtube.com/watch?v=ZWCvNFUN-sU&feature=youtu.be) 📼 🆓
           * [CDK Best Practices](https://github.com/kevinslin/open-cdk) 💻 🆓 📰