How do I access Azure AI Video Indexer ARM API Programatically?

Question

I'm quite lost here. For some reason, almost all documentation relating to my problems are bringing up a 404.

I'm trying to programmatically access Azure AI Video Indexer. I've downloaded (and slightly modified) the ARM API example from the github here:
https://github.com/Azure-Samples/media-services-video-indexer/tree/master/API-Samples/C%23/ArmBased

And set up my Azure resources. I created a Video Indexer service, as well an Entra ID app registration with the following permissions:

When I try to use the code to get an account access token (code):

   public static class AccountTokenProvider
   {
       private static readonly string clientId = "removed";
       private static readonly string clientSecret = "removed";
       private static readonly string tenantId = "removed";

       public static async Task

Answer 1

After a lot of trial and error, I managed to get this working.

For me, it was because I hadn't created the correct role assignment. It's also non-obvious how to do it.

Steps that fixed it for me:

• Create the app registration in the portal (Microsoft Entra ID > App registrations > New registration) if not already done.
• Copy the name of the app. You'll need it later!
• Still in the portal, go to the Video Indexer resource that you created.
• Go to Access control (IAM) > Role assignments > Add > Add role assignment.
• Select Privileged administrator roles > Contributor.
• Under Members, select "User, group, or service principal", then click Select members.
• Here's the important bit: A right-hand pane appears with a list of users, but it doesn't include your app name. However, if you search for your app name, it appears. Click it, then click Select.
• Click Review + assign.

You've now set up the correct role assignment for your app and the video indexer resource.

Once I'd done that, I could successfully generate the video indexer access token using the app's bearer token.