plaintext You are building a video chat application with JavaScript, Vue.js, and Twilio Programmable Video. The app requires users to provide a username before they can access the chat. Once a user enters their username, they will be able to join a room and start chatting. The rooms are represented by real-time audio, video, and/or screen-share sessions. Participants can share audio and/or video media with one another. Tracks represent individual audio and video media streams shared within a Room. LocalTracks capture the audio and video from the local microphone and camera. RemoteVideoTracks capture the audio and video tracks from other participants connected to the room. The app uses an event bus to communicate between components. When a user submits a new room, it triggers an event that is listened to by the Rooms component, which then appends the newly created room to the list of rooms. The Video component displays local and remote tracks in real-time. It also logs events such as when a participant joins or leaves the room. The app uses Vue.js CLI for scaffolding a new Vue project. The Node.js server is used to generate an access token, which is required for creating a chat room. Twilio Programmable Video API provides the functionality for building video chat applications. The app has a main component that houses other components such as AddRoom, Rooms, Logs, and Video. Each component plays a crucial role in the functioning of the application. When a user enters their username, they can start chatting by clicking on any room. Once a user clicks on a room, the app creates a new chat for that room and displays local and remote tracks. The app also logs events such as when a participant joins or leaves the room. Overall, this is a comprehensive guide to building a video chat application with Vue.js and Twilio Programmable Video.