A:AnswerNetflix, Amazon, Youtube among others have 4K content.
HDR is the ability of the TV to show very high illuminated areas of light surrounded by darker objects and still be able to see detail plus a wider color palette
A:Answergo to the TV's settings -> support -> open e-manual.
Also, you can get it online on the samsung website. http://www.samsung.com/us/support/owners/product/UN65KS8500FXZA
A:AnswerIt's 4k when you add a 4k compatible device like let's say xbox 1 s it recognize that the tv was 4k and asked if I wanted to broadcast in 4k and the most obvious way is to play something in 4k like a 4k youtube video or 4k Netflix but tv is definitely 4k.
A:AnswerBelieve it or not, it pulls like 230 WATTS (not amps) or so. I couldn't believe either, since much smaller units elsewhere in the house pull about the same amount of juice....
A:Answercheck your internet bandwidth requirements, you may be below the minimum ...I can see some grain when I press play for the first time on a title but it goes away as the buffer gets replenished.
A:AnswerHDR comes embedded in certain content, you don't need to activate it, your TV will receive the data and adjust properly..(there is an HDR+ option in picture config but it is artificial for non HDR content)