Dive deeper into abstract syntax tree (AST) transformations in this advanced video tutorial. Explore techniques for rewriting HTML image tags to implement srcSets, cloud image processing, and performance optimizations. Learn how to use tools like Unified JS, AST Explorer, and rehype-parse to manipulate and transform code structures. Discover practical applications with responsive-lazyload and Cloudinary integration. Follow along as the instructor demonstrates real-world examples, including working with Gatsby images and local image processing. Gain insights into JavaScript and Markdown transformations, stringifying techniques, and sending nodes for further processing. Perfect for developers looking to enhance their skills in code manipulation and optimization.