The tutorial discusses the use of api.video's APIs and SDKs to build a custom livestreaming service, which can be used for various purposes such as video classes, product instruction manuals, and live streaming events. The service allows users to securely upload and store videos, customize the video player, create their own livestreaming service using the API or user interface, access stats and analytics, and more. The tutorial also covers how to connect a Zoom meeting to the livestream service using the RTMP Server URL and stream key provided by api.video. Additionally, it introduces Replit, an in-browser IDE that supports multiple languages and frameworks, which can be used for building and testing the livestreaming service.