This video was intended to show User Defined Routes (UDRs) and a few items were added on to demonstrate how they work.  It starts with some Azure Networking Basics and then we review a hub and spoke network.  From there, A Windows Server with Routing and Remote Access Services (RRAS) is configured as a Network Virtual Appliance (NVA) to route traffic between the spokes in the network.  UDRs are configured on the spoke subnets that send inter-spoke traffic to the NVA.  After that, we add a firewall into the network and direct internet traffic to the firewall with a default route in the UDR.

Links:

Zero to Hero with Azure Virtual Desktop https://www.udemy.com/course/zero-to-hero-with-windows-virtual-desktop/?referralCode=B2FE49E6FCEE7A7EA8D4

Hybrid Identity with Windows AD and Azure AD https://www.udemy.com/course/hybrid-identity-and-azure-active-directory/?referralCode=7F62C4C6FD05C73ACCC3