app setup

docs/docs/developer/backend/Backend_Setup.mdx

@@ -23,6 +23,11 @@ Before you start, make sure you have the following:
 
 **Note:** If you are not very experienced in backend development, we recommend installing [Homebrew](https://docs.brew.sh/Installation) (for macOS or Linux) or [Chocolatey](https://chocolatey.org/install) (for Windows).
 
+#### Video Walkthrough
+
+<iframe width="560" height="315" src="https://www.youtube.com/embed/JyXQM0B0Gnc?si=_2W2GU5Qr7dn7gC7" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
+
 ## I. Setting Up Google Cloud & Firebase ☁️
 
 1. **Install Google Cloud SDK:**