This tutorial provides a step-by-step guide to creating a video calling app in WordPress using the Prebuilt Video SDK, which allows users to create meetings and join them with real-time webcam functionality without any installation required. To start, developers must sign up for a free account, generate an API key, add a custom HTML block to their page, and paste pre-built code into it, replacing the API key with their own. The tutorial covers basic features such as joining screens and controlling cameras, as well as advanced features like cloud recording and customizable branding. For support and questions, developers can join the Discord community or reach out to the author on Twitter.