Recently (2016) YouTube added support for BT.2020 HDR content such as https://youtube.com/playlist?list=PLyqf6gJt7KuGArjMwHmgprtDe... - you’ll know it’s an HDR video on YouTube by a red symbol that says HDR over the quality control, or if you turn on Stats for Nerds from settings it says bt.2020 in the text somewhere. Even more recently YouTube added live streaming HDR https://blog.youtube/news-and-events/seeing-believing-launch... which should come in handy now that PS5 supports HDMI 2.1 and HDR, making the 48” LG OLED TV one of the best gaming monitors ever. (But really expensive and kind of big still...)
Unfortunately HDR is backwards compatible, so you have to know your video out and screen are both HDR too. Most flagship OLED cellphones are HDR in P3 colour space if they cost over US$800. Dolby Vision content on Netflix like https://www.netflix.com/title/81017017?s=i&trkid=13747225 would also show off HDR. I can’t seem to find evidence in the Stats for Nerds box on iOS that it is indeed playing back an HDR copy of the video. You could also try this app, but it didn’t seem to detect my iPhone as Dolby Vision capable when it was: https://apps.apple.com/us/app/dolby-summit/id1528227248 Oh— one last thing, for best colour reproduction, turn off Night Shift, True Tone and turn the brightness all the way up. That will give you the maximum range of colours your screen supports from the most dim blacks to the brightest reds, greens and blues on an OLED display...
> Recommendation ITU-R BT.2100 – Image parameter values for high dynamic range television for use in production and international programme exchange, specifies parameters for High Dynamic Range television (HDR-TV) signals to be used for programme production and international programme exchange. This Report provides background information on HDR in general, and for the perceptual quantization (PQ) and hybrid log-gamma (HLG) HDR signal parameters specified in the Recommendation.
For instance, it confirms what I said elsewhere that 8-bit is mostly fine for consumers to watch HDR:
> The non-linearity employed in legacy television systems (Recommendations ITU-R BT.601, BT.709 and BT.2020) is satisfactory in that 10-bit values are usable in production and 8-bit values are usable for delivery to consumers; this is for pictures with approximately 1 000:1 dynamic range[5], i.e. 0.1 to 100 cd/m2.
> [Footnote 5]: This definition of dynamic range refers to the luminance ratio between the dimmest and brightest possible pixels presented on the display. However quantization artefacts, known as banding, may be visible, particularly in low lights, at luminance levels substantially brighter than the dimmest pixel. Quantization artefacts may, therefore, limit the “effective” dynamic range that is free from banding.
> The PQ HDR system generates content that is optimum for viewing on a reference monitor in a reference viewing environment. The reference monitor would ideally be capable of accurately rendering black levels down to or below 0.005 cd/m2, and highlights up to 10 000 cd/m2. Also, the ideal monitor would be capable of showing the entire colour gamut within the BT.2020 triangle. The viewing environment would ideally be dimly lit, with the area surrounding the monitor being a neutral grey (6 500 degree Kelvin) at a brightness of 5 cd/m2. However, content often must be viewed or produced in environments brighter than the reference condition, and on monitors that cannot display the deepest blacks or brightest highlights that the PQ signal can convey. In these cases the display characteristic needs to be changed in a process often referred to as display mapping (DM).
Some of the most interesting sections of BT.2390 are on the advantages of ICTCP or ITP, for short, which is used by Dolby Vision. Apparently due to “constant intensity” if I’m reading this correctly, YCbCr is less preferred and if possible, RGB (in full 4:4:4) is preferred, or one of the other encodings suggested, like ITP or "Y′CC′BCC′RC". https://professional.dolby.com/siteassets/pdfs/ictcp_dolbywh... might also be relevant here.
Recently (2016) YouTube added support for BT.2020 HDR content such as https://youtube.com/playlist?list=PLyqf6gJt7KuGArjMwHmgprtDe... - you’ll know it’s an HDR video on YouTube by a red symbol that says HDR over the quality control, or if you turn on Stats for Nerds from settings it says bt.2020 in the text somewhere. Even more recently YouTube added live streaming HDR https://blog.youtube/news-and-events/seeing-believing-launch... which should come in handy now that PS5 supports HDMI 2.1 and HDR, making the 48” LG OLED TV one of the best gaming monitors ever. (But really expensive and kind of big still...)
Unfortunately HDR is backwards compatible, so you have to know your video out and screen are both HDR too. Most flagship OLED cellphones are HDR in P3 colour space if they cost over US$800. Dolby Vision content on Netflix like https://www.netflix.com/title/81017017?s=i&trkid=13747225 would also show off HDR. I can’t seem to find evidence in the Stats for Nerds box on iOS that it is indeed playing back an HDR copy of the video. You could also try this app, but it didn’t seem to detect my iPhone as Dolby Vision capable when it was: https://apps.apple.com/us/app/dolby-summit/id1528227248 Oh— one last thing, for best colour reproduction, turn off Night Shift, True Tone and turn the brightness all the way up. That will give you the maximum range of colours your screen supports from the most dim blacks to the brightest reds, greens and blues on an OLED display...