Explore cross-browser compatibility challenges in this 30-minute video tutorial. Learn about differences in browser user agent styles, checking CSS property support, and embracing progressive enhancement. Discover feature queries with @supports, understand when polyfills are necessary, and explore PostCSS for enhanced compatibility. Gain insights on balancing consistency across browsers while leveraging modern CSS features. Access practical examples through provided CodePen links and utilize resources like caniuse.com and MDN for browser support information.