Facebook video adds AV1 support

What this post added

This post details the implementation of trial support for the AV1 video format on Facebook video. It describes the benefits of AV1 (improved compression efficiency, reduced buffering) and the challenges (slower encoding times). The implementation strategy involved a segment-based encoding approach to parallelize encoding tasks across a cluster, followed by stitching and muxing. The post also outlines steps for users to view AV1 content using Chrome Canary and mentions the ongoing development of browser support and the eventual switch to the official AV1 release version.