How Streaming Works: A Plain-Language Guide
Streaming can feel like magic, but the underlying idea is simple. Here's a general walkthrough of the concepts behind services like Peacock.
Content sits on remote servers
Shows and movies are stored on servers operated by the streaming provider or a content delivery network, not on your device.
Your app requests small chunks
When you press play, the app downloads the video in small pieces just ahead of when you'll watch them, rather than the whole file at once.
Quality adjusts to your connection
Adaptive bitrate streaming automatically raises or lowers video quality to keep playback smooth as your network conditions change.
Live streams work a bit differently
Live TV and sports are encoded and delivered in near real time, which is why live streams can be more sensitive to a slow connection than on-demand video.
Common questions
What's the difference between on-demand and live streaming?
On-demand content is stored and can be started, paused, or rewound whenever you like. Live streaming delivers a broadcast in real time, like traditional television.
Why does video quality sometimes change automatically?
Most streaming apps use adaptive bitrate streaming, which adjusts video quality automatically based on your current internet connection speed.