YouTube has rolled out high dynamic range (HDR) to users of
the iPhone X, enabling improved contrast and color on HDR-enabled YouTube
videos.
As spotted by Macrumors, videos like those from the popular
HDR Channel, are now able to be viewed in HDR mode. Neither the iPhone X nor
the Apple TV are able to output the videos in 4K, however.
Not to be confused with HDR for photography, high dynamic
range for video and TVs expands the range of both contrast and color
significantly. Bright parts of the image can get much brighter, so the image
seems to have more "depth." Colors get expanded to show more bright
blues, greens, reds and everything in between. OLED-powered screens like the
one on the iPhone X are particularly adept at showing HDR.
The HDR capability isn't stated in the release notes for the
latest 13.17 update which only lists "General fixes and stability
improvements".
YouTube is the latest company to enable HDR for the iPhone X
after Netflix turned the capability on with iOS 11 in September 2017.
Mobile Digital Media YouTube
For iOS users, YouTube videos in HDR can be viewed on the
iPhone X, but the feature does not yet appear to be working on the latest iPad
Pro models. YouTube has many HDR-supported videos on its site, with dedicated
channels like The HDR Channel providing videos for you to watch in HDR on iOS.
To make sure of the quality of playback find a video to play, then tap anywhere
on the video itself, tap the three dots in the top right-hand corner of the
screen, tap "Quality," and then make sure it reads 1080p60 HDR.
Apple debuted HDR support last year with the "Super
Retina" display in the iPhone X, which became the first HDR OLED display
incorporated into one of Apple's smartphones. Apple also lists the iPhone 8 and
iPhone 8 Plus as supporting HDR, but the displays for these devices are not the
same as the Super Retina display on iPhone X, so any HDR content played on the
8 or 8 Plus isn't true HDR.
On the iTunes Movies Store on Apple TV 4K, select films also
support 4K, HDR10, and Dolby Vision when paired with compatible 4K television
sets. Although YouTube recently updated its Apple TV app and listed a few
videos as "4K," the app still has yet to support true 4K. When
viewing details about a video, maximum available resolution is still listed as
1920 x 1080, while 4K resolution is 3840 x 2160.
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