How to scale a video learning platform
From transcoding and CDNs to live classes and test-day spikes: an engineer's guide to scaling video learning for thousands of students at once.
#video streaming
7 articles tagged #video streaming
Articles
CDN caching: how edge caches work, with Cloudflare rules
How edge caches decide hits and misses, what Cloudflare caches by default, cache rules for HTML, APIs and HLS, measuring hit ratio, and purging safely.
Video transcoding pipelines: from upload to HLS
How to turn an uploaded lecture into encrypted HLS: probing, encoding a ladder with FFmpeg, queue-driven workers, CPU vs GPU vs spot capacity, retries and what one lecture really costs.
Adaptive bitrate streaming and bitrate ladders explained
How players choose between renditions, what hls.js and dash.js do by default, and how to design a bitrate ladder that keeps lectures playing on patchy mobile networks.
HLS vs DASH: how the formats compare, and where CMAF fits
HLS and MPEG-DASH compared: playlists vs manifests, iPhone and Android support, encryption and DRM, low latency, and how CMAF lets one set of segments serve both formats.
WebRTC vs HLS for live classes: latency, scale and cost
Sub-second WebRTC or CDN-scale HLS? Latency budgets for live classes, SFUs, Low-Latency HLS, RTMP vs SRT ingest, the cost of a 5,000-student class and a hybrid design.
Multi-CDN and CDN failover for video platforms
Why one CDN is a single point of failure on exam and launch days, how DNS, player-side and content-steering failover compare, and what must match across CDNs.
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