End-to-End Design
Design YouTube · Part 3
Problem context
Design a service where users upload videos and a global audience watches them on any device and any connection. Uploads can be several gigabytes, and viewers expect playback to begin within a second or two and remain smooth as available bandwidth changes. The scope here is upload and delivery; browse, search, and recommendations are treated as a separate ranking problem.
What a strong answer sounds like
State the decision, connect it to a requirement, and name the tradeoff. Keep the design focused on the workload in the prompt.
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