added advanced tutorial video

docs/Introduction/tutorials/advanced-tutorial.md

@@ -15,6 +15,11 @@ metadata:
     3: 1459
     4: "#dbe1f8"
 ---
+
+<p>
+  https://www.youtube.com/watch?v=ay4rXZhAefs
+</p>
+
 > 👍 Prerequisites
 >
 > This tutorial requires basic knowledge about Ethereum, smart contracts, and the Chainlink Request & Receive cycle. If you're unfamiliar with those concepts, follow the [Beginners](../beginners-tutorial/) or [Intermediates](../intermediates-tutorial/) tutorials.
@@ -204,4 +209,4 @@ Then, using your knowledge of external adapters, find a different adapter on the
 
 - <a href="https://blog.chain.link/connect-smart-contract-to-twitter-api/" target="_blank">Blog: Connect a Smart Contract to the Twitter API</a>
 - <a href="https://blog.chain.link/create-tesla-smart-contract-rental/" target="_blank">Blog: Connect a Tesla Vehicle API to a Smart Contract</a>
-- <a href="https://blog.chain.link/oauth-and-api-authentication-in-smart-contracts-2/" target="_blank">Blog: OAuth and API Authentication in Smart Contracts</a>
+- <a href="https://blog.chain.link/oauth-and-api-authentication-in-smart-contracts-2/" target="_blank">Blog: OAuth and API Authentication in Smart Contracts</a>