Video. Upload and streaming

A video platform for online courses: bytes go past the servers (uploads by presigned URL into object storage, viewing through a CDN), and transcoding runs in the background on workers sized for an ordinary evening, not for the peak.

Diagram of a video platform: uploads go past the servers into object storage, workers transcode them in the background, and a CDN streams them out.

System Design — Load balancers, caches, queues and regions: build a system that holds the load