This tutorial provides a step-by-step guide on how to add a host panel to a Twilio Video call, allowing hosts to remove participants from the call with a single API call. The application is built using Twilio Video, Twilio Functions, and vanilla JavaScript. The process involves cloning a starter project, setting up the necessary dependencies, adding a backend function to remove a participant, creating an HTML layout for the host panel, and implementing logic to open and close the host panel. The tutorial also covers testing removing a participant from a video call and discusses next steps for roles and permissions.