In other words, there might actually be some HDR titles currently not included in any of the app's sub-categories - essentially making them impossible to find. What's worse, Amazon actually has separate listings for SDR and 4K/HDR versions of all its supported content, and only the SDR versions seem to ever appear in search results on some devices when a title is typed in. Likewise, searching for the keyword 'HDR' does not pull up a list of HDR titles. And even more confusing, if one switches from the 'Homepage' to the 'Originals' sub-heading, there are additional sections for Ultra HD shows and movies that include some titles missing from the homepage's categories and vice-versa. Though scrolling down the smart TV app's 'Homepage' does reveal Ultra HD categories for shows and movies, users have to select each title individually to see if they also support HDR. Unlike some other streaming services, however, Amazon Prime Video doesn't make it quite as easy to find HDR or Dolby Atmos content through its platform on certain apps and TVs. Meanwhile, Prime Video Dolby Atmos playback is currently supported via several media players and smart TVs with Dolby Atmos output support, including the Fire TV Cube, Fire TV Stick 4K, Samsung TVs (2017 or newer), LG OLED TVs (2017 or newer), VIZIO TVs (2015 or newer), or Xbox One, Xbox One S, and Xbox One X game consoles. Standard HDR10 playback is provided for displays without HDR10+ capabilities, and Dolby Vision is offered for select titles on Dolby Vision TVs from manufacturers like LG, Sony, VIZIO, TCL, and Hisense. According to the company, all HDR content is available in HDR10+ via compatible Samsung 4K TV models and will default to that format on supported displays. Primarily consisting of the provider's own assortment of original series and movies, Amazon HDR support is available on virtually all current gen 4K HDR compatible smart TVs and media players with a Prime subscription. And when it comes to streaming services, Amazon Prime Video continues to offer a respectable library of HDR titles. As 4K HDR TV and immersive audio adoption continues to grow, more and more content providers have begun to embrace HDR10+, Dolby Vision, and Dolby Atmos content.

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