Add Video Series section to Scaffold Stellar documentation

Co-authored-by: janewang <734336+janewang@users.noreply.github.com>

Author: Copilot

docs/tools/scaffold-stellar.mdx

@@ -113,3 +113,12 @@ This template provides a ready-to-use frontend application with example smart co
 ### More Resources
 
 For more information, check out the [project on GitHub](https://github.com/theahaco/scaffold-stellar)!
+
+## Video Series
+
+Check out the [Scaffold Stellar video series on YouTube](https://www.youtube.com/playlist?list=PLmr3tp_7-7Gjj6gn5-bBn-QTMyaWzwOU5) for step-by-step tutorials and guides:
+
+- [Scaffold Stellar: Get started building](https://www.youtube.com/watch?v=H-M962aPuTk) - Learn how to install Scaffold Stellar, review included libraries and integrations, and get your development environment up and running.
+- [Building dApps with Scaffold Stellar](https://www.youtube.com/watch?v=t85jrhsTYV8) - An overview of the open source Scaffold Stellar development toolkit and how it streamlines the creation and management of Stellar apps.
+- [Scaffold Stellar: Getting Started and Guess the Number](https://www.youtube.com/watch?v=86hWe8Ragtg) - A practical tutorial that walks through improving the default "Guess the Number" dApp included in Scaffold Stellar.
+- [Rapid Application Development with Scaffold Stellar | Meridian 2025](https://www.youtube.com/watch?v=sx77r9qQOeE) - Introduction to Scaffold Stellar's rapid development environment, showing how to go from prototype to production.