Explore the development of a ChatGPT chatbot with memory using GPT-4, FastAPI, and JavaScript in this comprehensive tutorial video. Learn how to implement three different user interfaces for the OpenAI GPT-3.5 Turbo API, featuring conversational memory and token limit management. Dive into the code review process, covering backend development with FastAPI Python and frontend creation using HTML, CSS, and JavaScript. Gain insights into setting up the development environment, installing required dependencies, and understanding the structure of the application. Follow along as the video breaks down each UI implementation, focusing on the main interface with memory functionality. Discover how to style your chatbot with CSS and optimize its performance. Perfect for developers looking to create advanced AI-powered chatbots with seamless user experiences.