Design a Video Streaming Service

Requirements

A video streaming service lets creators upload videos and viewers watch them on any device and network.

Functional:

• Upload a video file.
• Play a video with seek, pause and quality that adapts to the connection.
• Search and browse by title (metadata only here).

Non-functional:

• Playback starts in about a second or two and rarely stalls.
• Works on phones, TVs and browsers over varying bandwidth.
• Highly available for viewing; uploads may take minutes to become playable.
• Cost-aware: bandwidth and storage dominate the bill.

Out of scope: recommendations, copyright detection, comments, live streaming (see exercises).