09-28-2019, 11:58 AM
Apps on the ATV should be considered the responsibility of the author. Application capability varies from device to device for various, generally undisclosed, reasons but the competitive relationships between Apple, Amazon and Google result in various rendering issues. E.g. YouTube 4K/HDR isn't currently available on the ATV4K although it is available on some iOS devices. Atmos is not available on the ATV4K on Amazon features. These issues are well know and not limited to the ATV. Viz. YouTube on Amazon Fire devices or YouTube 4K/HDR via Safari vs. Chrome under macOS.