Just got the Apple TV 4k and hooked it up to my Samsung new oled65c7p. I notice in many of the netflix's 4k shows there is a lot of what looks like film grain/noise. Some shows are not as bad. I tried several 4k UHD youtube videos on the built in 4k youtube app on the tv and no grain at all (and was blown away). Im assuming the grain is in the original filming wether it be high ISO noise or just film grain and then the 4K HD makes it more obvious?