Understanding VOD (Video on Demand) and How It Works in IPTV,
VOD, or Video on Demand, is a system that enables users to watch video content (movies, TV series, documentaries, etc.) at any time—not tied to a broadcast schedule.
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In a VOD-enabled IPTV system, content is stored on servers or content libraries. When you, the user, request a specific video, the system streams it (in real-time) to your device via a unicast connection (i.e., a one-to-one stream).
This is different from live TV, which often uses multicast (sending one stream to many users at once). With VOD, each user gets their own dedicated stream.
Because of that, VOD systems must manage server resources, bandwidth, content encoding, DRM, and content delivery networks (CDNs) to ensure reliable, high-performance streaming.
In short, VOD makes an IPTV service flexible, convenient, and powerful. Without it, you’d be locked into fixed schedules and limited viewing options.



