In the previous video, we saw how to securely accessing Azure Storage accounts using Shared Access Signatures. You can check that video here: https://youtu.be/pXsVR67gQ7s
In this video, we are taking the security one step further by limiting the access to storage accounts completely by configuring Firewalls on them. We can limit the access to either particular subnets within specific virtual networks in Azure. Or we can limit access to specific IP addresses or address ranges.
This ensures that the storage account will only be accessible from the locations you configure. That way control the access.