Explore the practical applications of HTML5 and CSS3 in modern web development through this 58-minute conference talk from PHP UK Conference 2011. Discover how to leverage these technologies to create visually appealing and interactive websites without relying on plugins or complex hacks. Learn strategies for navigating browser differences, ensuring backwards compatibility, and future-proofing your code as standards evolve. Gain insights from Martin Beeby, a Microsoft Developer Evangelist with extensive experience working on projects for major brands, as he demonstrates real-world techniques for implementing HTML5 and CSS3 features such as video playback, animations, and rounded corners across different browsers.