Just went out *at midnight* and tried the high ISO setting and video capabilities of the D500 under not so optimal conditions. Of course, this being the brighter season here in the Nordic countries, but I live pretty far down south and night still is very much detectable.
This is a frame dump from a video shot with the AFS 35/1.4 G at ISO 25600. W/b set to Auto and I had two opposite competing light sources: a vast expanse of deep blue sky and a yellow-orange sodium street lamp shining directly over this thicket of flowering Japanese Rose Rosa rugosa. As this invasive species is on the National Black List, the ideal colour rendition perhaps might be all black (!), but to no avail; the D500 provided an uncannily accurate colour rendition of the flowers and foliage. This is taking automated white balance a great stride forward, in my opinion. One can rely on the functionality for once, it seems.
A pity that my favourite RAW editor, Photo Ninja, does such a lousy job with D500 NEFs, in particular for high ISO captures. I am forced to use, or rather lament, Capture NX-D, which must be the slowest conversion program ever from Nikon. The PictureCode guys do promise future support for D500 though.