Added video for Github page (#812)

Author: JMarsh04

src/react/docs/workshop-guidance/devices/RMD_121.md

@@ -12,6 +12,10 @@ When you create a device configuration profile, you have two policy types: Templ
 * Templates include a logical grouping of settings that configure a feature or concept, like email, kiosk devices, and device firmware.
 
 Use the Endpoint Security node to configure device security and to manage security tasks for devices when those devices are at risk. The Endpoint security policies are designed to help you focus on the security of your devices and mitigate risk. The available tasks can help you identify at-risk devices, to remediate those devices, and restore them to a compliant or more secure state.
+* * *
+ 
+### **Video Walkthrough**
+<iframe width="560" height="315" src="https://www.youtube.com/embed/Ynu0wECs4bM?si=AB2UqkZs2vMrBJSM" 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>
 
 ## Reference
 * [Device Configuration](https://learn.microsoft.com/en-us/mem/intune/configuration/device-profiles)