If you are just getting started with analytics on video, I would steer you towards Video Indexer as the preferred solution and not recommend using the AMS analytics.
We recently announced that we are going to be deprecating that in favor of Video Indexer going forward.
https://learn.microsoft.com/en-us/azure/media-services/latest/analyze-video-retirement-migration-overview
As Microsoft’s Responsible AI Standards outlines, Microsoft is committed to fairness, privacy, security, and transparency with respect to AI systems. To align with these standards, Azure Media Services is retiring the Video Analyzer preset on September 14, 2023. This preset currently allows you to extract multiple video and audio insights from a video file. Customers can replace their current workflows using the more advanced feature set offered by Azure Video Indexer.