An introduction to Adaptive Bitrate Streaming and how Pinterest was able to reduce startup latency for videos. Plus, the architecture of open source applications and how Anthropic was able to improve RAG.

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Pinterest has optimized video playback by introducing Adaptive Bitrate Streaming and embedding manifest files in their metadata API to reduce startup latency. They used both HLS for iOS and DASH for Android. By caching popular video manifest files, Pinterest achieved a 36.7% reduction in p90 startup latency on iOS and improved the user experience by reducing the number of users facing delays in video startup.

How Pinterest Optimized Video Playback

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