YouTube Now Offers Support for HDR Videos on the iPhone X
Actually, you can now enjoy videos with high dynamic range in the YouTube app on the iPhone X in full glory. There are enough channels and content to try this out. Just look for the keyword "HDR" and you'll see a tremendous amount of color.
Who does not trust roasting: YouTube even marks the videos with HDR in the settings for the display (see screenshot).
The iPhone X is apparently the only device that supports playback. We also tried on the iPad Pro to play the same videos in HDR, without success. Netflix, for example, allows HDR playback on multiple new Apple devices.
Display Can Retain HDR, Vendors
Besides YouTube, Netflix is still one of the few vendors in its class App on the iPhone X also displays HDR videos. You can also enjoy HDR videos with Netflix on the iPhone 8 and 8 Plus, as well as the iPad Pro 10.5 inches and 12.9 inches (second generation). Also on the Apple TV 4K supports the platform HDR.