Why Real-Time Notifications Matter for Video Platforms

When a K-pop music video suddenly goes viral in South Korea, or a Japanese gaming stream breaks into the trending charts, users of TopVideoHub should know about it within seconds — not the next time they refresh. WebSockets make that possible.

This article walks through building a WebSocket notification server that broadcasts "new trending video" events to connected clients as soon as the cron fetcher discovers them.

Architecture Overview

Cron Fetcher (PHP) ──→ Redis Pub/Sub ──→ Python WS Server ──→ Browser clients

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The PHP cron fetcher publishes events to Redis. A lightweight Python WebSocket server subscribes to Redis and fans those events out to all connected browsers.…