# How Loom Rebuilt Its Video Engine for Async Communication

Page: https://stenobird.com/podcast/the-cto-podcast-with-fexingo-technical-leadership-architecture-and-engineering-org-7871807/how-loom-rebuilt-its-video-engine-for-async-communication
Text version: https://stenobird.com/podcast/the-cto-podcast-with-fexingo-technical-leadership-architecture-and-engineering-org-7871807/how-loom-rebuilt-its-video-engine-for-async-communication.md
Podcast: [The CTO Podcast with Fexingo: Technical Leadership, Architecture, and Engineering Org](https://stenobird.com/podcast/the-cto-podcast-with-fexingo-technical-leadership-architecture-and-engineering-org-7871807)
Published: 2026-06-27T07:43:41+00:00
Episode link: https://audio.fexingo.com/business/the-cto-podcast/episode-0076.mp3
Audio file: https://audio.fexingo.com/business/the-cto-podcast/episode-0076.mp3
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JSON: https://stenobird.com/v1/public/podcasts/the-cto-podcast-with-fexingo-technical-leadership-architecture-and-engineering-org-7871807/episodes/how-loom-rebuilt-its-video-engine-for-async-communication
Duration seconds: 556

## Resource

In this episode of The CTO Podcast, Lucas and Luna dive into how Loom rebuilt its video recording and streaming engine to handle over 200 million videos per year while keeping latency under one second for uploads and playback. They explore the architectural shift from monolithic encoding to a microservices pipeline using WebAssembly for client-side transcoding, the trade-offs of moving from FFmpeg to a custom encoder, and how Loom cut infrastructure costs by 40 percent while improving reliability. The hosts also discuss the challenges of supporting asynchronous communication at scale, including real-time trimming and seamless playback across devices. If you're building a video platform or optimizing media delivery, this episode offers concrete lessons on balancing performance, cost, and user experience. Plus, Lucas shares how the team used Rust to reduce CPU usage for encoding by 60 percent. Tune in for a deep technical breakdown of one of the most popular async video tools in the workplace. #Loom #AsyncCommunication #VideoStreaming #WebAssembly #Rust #Transcoding #Microservices #FFmpeg #CostOptimization #Latency #Engineering #CTO #TechLeadership #Architecture #BusinessAndTechnology #FexingoBusiness #BusinessPodcast #MediaDelivery Keep every episode free: buymeacoffee.com/fexingo

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