Finally got the 4K TV and I wanted to see how good 4K looked like, so I went to YouTube and search for 4K material. I clicked on the 3 dots in upper right hand to see the out put quality, it was set to 720 so I WAS SO SURPRISED that it only went 1080p. I guess YouTube doesn't play 4k or am I doing something wrong? Can someone set me straight. I have the Neo U1 and I love it. Thinking of buying another unit, should I stay with another U1 or should I go to the new U9?