What 2015 TV is that? Also, do you have a youtube example that shows the same issue with the KS8000 but not with your older TV? My 65in ks9000 performs roughly about the same as my 55in Sony w900a with 1080p. The Sony's only real advantage is when dealing with gradients since it has a setting to smooth that out
This is my old TV that I am comparing the picture with:
https://www.komplett.no/product/589023#
It was released in early 2011, and at the moment it's greatly outperforming my 65'' KS8000 on picture when comparing TV shows via Netflix.
I don't completely understand what you mean with youtube examples, but when I try out 4k test videos on youtube it looks absolutely stunning on the KS8000-- crystal clear picture, no static/grain, beautiful strong deep colors -- this is what I imagined film would look like on this TV. My problem is with Netflix which is where I am watching most of my TV shows, and no matter how much I fiddle with the settings I can't get rid of the overwhelming grain/static that destroys the picture every time I try to watch something.
I dunno of this helps but my KS8000 settings are :
Backlight: 10-12 Sometimes I boost it up to 18-20 to get that pop in brightness.
Brightness: 45
Sharpness: 10 I see no difference with 0
Color: 55 I like vibrant colors I have tried it all the way up to 60 on some shows.
Digital Clean View: On Turning this off often makes the grain/static even worse!
Auto Motion: Varied, but I see no difference in grain when it's on Auto, off or custom. I like having it on as it gives me smoother camera movement.
Smart Led: High
HDMI UHD Color: Enabled
HDMI Black Level: Auto
Dynamic Contrast: Off - This is a hard sacrifice. I like Dynamic Contrast on low, but it makes the grain even more visible.
Color Tone Standard:- I know everyone loves Warm 2, but that ugly reddish tint is just overwhelmingly distracting to me.
White Balance : Default
Gamma: 0
Color Space: Auto