This tutorial follows up on a previous one about building a video chatting app and focuses on integrating Firebase for authentication and analytics purposes. The author guides users through setting up Firebase, enabling sign-in methods, creating new views for user search and settings, logging in with FirebaseUI, creating a user database, searching for users, adding settings, and reconnecting the video call screen. By the end of this tutorial, users will have an app where they can log in, set their display names, search for other users within the app, and join calls with those users.