If you’re rocking a 4K Apple TV then there are a couple of settings changes that you can make that could help improve the display quality.
Head into Settings -> Video and Audio, and change the following…
- Change Format to 4K SDR
If you have an HDR TV, then switch this to SDR. Also, head into Match Content and make sure that “Range” is “On”, which will mean that it will fall back to SDR when necessary and only switch to HDR when the format is such. This should prevent the black-screen flickering that you’ll see in YouTube.
However, some say menus and screensavers look worse as a result.
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- Change HDMI output to RGB High
It’s more accurate for SDR on the Apple TV 4K box due to a bug in the way it processes YCbCr signals. For HDR10 & Dolby Vision content, the setting makes no difference.


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