After making some research in internet, I just figure out found information about ICtCp. As I know Dolby Vision in Netflix is usint ICtCp, Apple TV 4K listing in it's spec it support Dolby Vision (profile 5).
The question is there no current player (including Apple TV, Oppo, Panasonic elc) have ICtCp format output, all they have only RGB or YCbCr. So IF there is any conversion work on ICtCp to YCbCr, it it NOT related to/caused by HDFury. So how Netflix Apps in Apple TV or in other player convert ICtCp to YCbCr.....I don't know.
And I don't even know which TV brand support ICtCp signal input currently.
One more thing is ........ ICtCp is NOT UHD Bly-ray Standard, it still store as YCbCr even-though ICtCp is more advantage on HDR Wide Color Gamut.
The output to the display is converted to standard color space which the display can accept. See the White Paper:
Thanks for your information.