HDR10
Open standard for HDR video — 10-bit colour, Rec.2020 colour space, PQ (Perceptual Quantizer) transfer function, static metadata.
Launched in 2015 by the Consumer Technology Association. Royalty-free (unlike Dolby Vision). Static metadata = one set of peak-nits / avg-nits for the whole film, not per scene. HDR10+ (Samsung/Amazon) added dynamic metadata. Every modern TV, Blu-ray, streaming service and game console supports HDR10. Dolby Vision is "premium quality HDR" with dynamic metadata + 12-bit colour, more common in the Apple ecosystem and premium content.