Implement defensive coding techniques for video upload and processing in ASP.NET Core using C#, Axios, and JavaScript. Learn how to use Axios cancellation tokens to handle request cancellations effectively. Explore validation methods, error handling, and best practices for secure file uploads. Dive into topics such as video creation, path management, file extension validation, and temporary file handling. Gain insights on implementing cancel upload functionality, managing uncaught exceptions, and optimizing the submission process. By the end of this tutorial, master the art of writing robust and secure code for handling video uploads in your web applications.