Reddit is one of the world's most trafficked websites with over 330 million monthly active users. They've built the vast majority of the infrastructure on AWS to support the increasing growth. As the world shifts to video-first, Reddit has redesigned their site and launched a new video platform. In this talk, we'll go over design paradigms, tradeoffs made, and lessons learned from rearchitecting one of the internet's top sites. See how this infrastructure operates at scale and how the team leverages ETS, Serverless, and Compute to serve over one billion videos a month.