SMPTE = The Society of Motion Picture Television Engineers
ST = Standard?
2086 = HDR static metada
"Mastering Display Color Volume Metadata Supporting High Luminance and Wide Color Gamut Images" describes static data such as MaxFALL (Maximum Frame Average Light Level) and MaxCLL (Maximum Content Light Level).
MaxCLL = Maximum Content Light Level - the value in nits of the brightest pixel in the entire clip.
MaxFALL = Maximum Frame Average Luminance Level - value in nits of any single frame. MaxFALL is generally smaller than MaxCLL, and is a parameter used by the display to prevent damage if a frame exceeds its safe handling capability — OLED pixels, for example, can burn out if run at maximum intensity for a long period of time.
example file: The Grand Tour - Seamen
Color range: Limited
Color primaries: BT. 2020
Transfer characteristics: PQ
Matrix coefficients: BT. 2020 non-constant
Mastering display color primaries: Display P3
Mastering display luminance - min: 0.0001 cd/m2, max: 1000 cd/m2
Maximum Content Light Level: 999 cd/m2
Maximum Frame-Average Light Level: 215 cd/m2
Codec configuration box: hvcC
HDR Format: SMPTE ST 2094 App 4, Version 0 (HDR10+)