8K resolution means 7,680 horizontal and 4,320 vertical pixels.
You can manually change the video quality of any video you’re watching on a computer, TV, or mobile device.
To change video quality while watching on your computer:
In the video player, click gear icon and select Settings .
Click Quality.
Select your preferred video quality: 4320p 8K
To change video quality while watching on your TV:
In the video player, select More .
Click Quality .
Select your preferred video quality: 4320p 8K
You cannot choose a high-definition setting if the video you are watching was uploaded in standard definition.
But, some high-quality formats may not be available for all devices, as they may not support the latest video compression technology or some screens do not have maximum resolution (8K).