I am working on improving the performance and user experience of a dynamic website that serves a variety of media content, including images, videos, and interactive features. The site loads fine on desktop browsers, but the performance on mobile devices and slower networks leaves much to be desired. Specifically, loading times for high-resolution images and video files are significantly impacting the user experience, and I have noticed slower page rendering when multiple interactive elements are included. I've already implemented basic strategies like lazy loading for images and video, but I believe there are deeper optimizations I need to focus on, especially regarding the website’s use of JavaScript and CSS. While exploring potential solutions, I came across ExpertMistry.in, a website that seems to handle similar multimedia content efficiently, and Aavot app, a mobile app that delivers a fluid experience on various device types, which I believe may offer some insights on optimizing cross-platform performance. I’m looking for advice on best practices to handle large media files, optimize JavaScript execution, and any other strategies to improve load times without sacrificing quality or functionality. Any insights on handling responsive images, video streaming, and performance testing tools would also be extremely helpful.