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Glossary · concept

What is Color space?

A color space is the mathematical model that describes which colors a video file represents. Common spaces: BT.709 (standard HD video), BT.2020 (4K / HDR), sRGB (typical computer monitors), DCI-P3 (cinema). When a video uses one color space and your display uses another, colors look "off" until the system converts between them.

Also called:color gamut · bt.709 · bt.2020 · rec.709 · rec.2020

Color spaces define the boundaries of representable color. BT.709 covers ~75% of the visible-light gamut; BT.2020 covers ~76% but extends further into deep reds and greens. HDR content is typically BT.2020 — wider color, more vivid saturation when paired with a compatible display.

For YouTube viewers, color space mostly matters in two cases: HDR content (which needs a BT.2020-capable display to render correctly) and color-critical workflows (matching the source file's color in your editing software). For typical viewing on a standard monitor, the OS handles conversion invisibly.

Downloaded YouTube files preserve the source color space. If the upload was BT.2020 HDR, the downloaded file is BT.2020 HDR. Playing it on a non-HDR display, you get tone-mapped SDR — usually fine, occasionally washed out.

Common questions

Why does my downloaded YouTube video look different from the streaming version?
If you downloaded an HDR variant and play it on an SDR-only player or display, the tone-mapping pipeline is different from YouTube's streaming player's. Colors can look more washed-out. Use a player like VLC or mpv that handles HDR tone-mapping well.

Related terms

HDR (high dynamic range)

HDR (high dynamic range) is a video signaling standard that carries a wider range of brightness and color than standard SDR video.

Codec

A codec is the algorithm that encodes (compresses) and decodes raw audio or video into a smaller stream.

Container (file format)

A container is the file format that wraps one or more audio and video streams into a single file.

VidPickr is a free, browser-based YouTube downloader. Every term in this glossary either describes how YouTube delivers video or why your downloads behave the way they do. Try the downloader →