I turned on the video upscaling initially when I got mine, and then turned it off immediately and left it off. I hated it. I would rather watch 1080 native than upscale it.
I hate it on high, but low looks excellent for everything I throw at it, but I had to set my TVs sharpness to zero to get it to play nice, otherwise its an artifacty mess.
in my experience, upscaling tends to either just blur the image or make up details. i recommend keeping the 4K media.
I turned on the video upscaling initially when I got mine, and then turned it off immediately and left it off. I hated it. I would rather watch 1080 native than upscale it.
I hate it on high, but low looks excellent for everything I throw at it, but I had to set my TVs sharpness to zero to get it to play nice, otherwise its an artifacty mess.