In the video "AI jako backend - ChatGPT do prototypowania?", Kuba Mrugalski demonstrates how to use ChatGPT as a backend for prototyping without coding by setting up a webhook to communicate with the GPT chatbot. He uses Make and Hopscotch tools to generate a webhook URL to send data to GPT via Open AI and retrieve responses in a JSON format. He then shows how to efficiently run the backend and choose the best fitting hashtags for the text input. Lastly, he offers a waitlist for a secret project on using OpenAI as a programmer for faster and more efficient prototyping.