This hotline application uses OpenTok for video chat and Nexmo for sending texts. It allows users to ask questions, receive answers from volunteers, and connect with each other in real-time using their webcams. The application includes features such as a simple interface for users to ask questions, provide phone numbers to receive text notifications when there are no questions, and a way for volunteers to provide their phone numbers to receive notifications when they can answer questions. The application is built on top of Express.js, Glitch, and uses the OpenTok and Nexmo APIs to handle video chat and text messaging functionality.