cdn | Iqraa.tech

How YouTube Works: Transcode Once, Serve From Edge

A look at how YouTube works. YouTube streams 500-plus hours of uploaded video every minute, to 2.5 billion monthly viewers, in resolutions from 144p to 8K. The architecture split that makes it possible: a heavy one-time upload pipeline that turns each video into dozens of pre-transcoded variants, and a thin playback path that serves from… Continue reading →

How Spotify Works: Audio CDN Plus Nightly Recommendation

How Spotify works architecture diagram with playback router, audio CDN, and recommendation ML

A look at how Spotify works. Spotify streams to roughly 600 million monthly active users across 100 million tracks, and the parts that look hardest (audio delivery at planet scale) are actually the easy part. The hard part, and the architectural bet Spotify made early, is keeping the recommendation surface honest: a per-user play history… Continue reading →