Modern Media Delivery

Codec selection, compression benchmarks, responsive images, lazy loading, and CDN delivery patterns — with production-ready code and real browser data.
Start: Core Media Fundamentals Responsive Delivery Lazy Loading & Priorities

Media assets are the dominant source of bandwidth cost and Largest Contentful Paint regressions on modern web platforms. This site covers the full delivery stack: choosing between AVIF, WebP, and legacy JPEG; tuning AV1, VP9, and H.265 encode pipelines; configuring Cache-Control and Vary: Accept headers correctly on CDNs; and writing srcset/sizes attributes that actually reflect your layout breakpoints.

Every guide targets engineers who need depth — benchmark tables, runnable CLI and HTML snippets, browser compatibility matrices (Safari 14/16, Chrome 85+, Firefox 93+, Edge 18+), and explicit tradeoff callouts rather than generic best-practice summaries.

Site Sections

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Core Media Fundamentals & Next-Gen Formats

Codec selection, compression benchmarks, MIME type configuration, cache-control strategies, and video codec theory covering AVIF, WebP, AV1, VP9, and H.265.

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Lazy Loading, Preloading & Fetch Priorities

Native lazy loading, IntersectionObserver patterns, preload vs prefetch decisions, and fetchpriority tuning for LCP images and critical video.

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Responsive Image & Video Delivery

Mastering srcset and sizes, art direction with <picture>, CSS container queries for dynamic media sizing, and framework integration for Next.js and React.

Start Here

If you are new to the site, these pages cover the highest-leverage decisions in a modern media delivery pipeline: