If you don’t have it already, here is a short sample from BBC Seven Worlds One Planet in HLG.
Mediainfo
General
Unique ID : 255300624580580099788532410877499080352 (0xC0111C9CF646CD1278ECF5660792FEA0)
Complete name : Seven Worlds One Planet S01E01 HLG Sample.mkv
Format : Matroska
Format version : Version 4
File size : 106 MiB
Duration : 46s 80ms
Overall bit rate : 19.2 Mbps
Encoded date : UTC 2019-11-08 16:55:39
Writing application : mkvmerge v39.0.0 ('In The Waiting Line') 64-bit
Writing library : libebml v1.3.9 + libmatroska v1.5.2
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@Main
Codec ID : V_MPEGH/ISO/HEVC
Duration : 46s 80ms
Bit rate : 18.6 Mbps
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.090
Stream size : 102 MiB (97%)
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : BT.2020 (10-bit)
transfer_characteristics_Original : HLG / BT.2020 (10-bit)
Matrix coefficients : BT.2020 non-constant
Audio
ID : 2
Format : E-AC-3
Format/Info : Enhanced AC-3
Commercial name : Dolby Digital Plus
Codec ID : A_EAC3
Duration : 46s 80ms
Bit rate mode : Constant
Bit rate : 640 Kbps
Channel(s) : 6 channels
Channel layout : L R C LFE Ls Rs
Sampling rate : 48.0 KHz
Frame rate : 31.250 fps (1536 SPF)
Compression mode : Lossy
Stream size : 3.52 MiB (3%)
Language : English
Service kind : Complete Main
Default : No
Forced : No
Text #1
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 23s 440ms
Bit rate : 82 bps
Count of elements : 8
Stream size : 243 Bytes (0%)
Language : English
Default : No
Forced : No
Text #2
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Duration : 23s 440ms
Bit rate : 82 bps
Count of elements : 8
Stream size : 243 Bytes (0%)
Title : SDH
Language : English
Default : No
Forced : No