AVC 10bit (aka Hi10P). No consumer hardware can decode that exotic format. CPU does all the work. Hi10P support in Kodi is subpar, though some improvements in Kodi 18. Thugh wouldn’t hold my breath here.
There are some exotic SOCs (RockChip) from China who can decode that format with a lot of limitations (e.g. only up to 720p with 16 Refs, and hence no 1080p). But no support in Kodi for that chips anyway.
It is a a dead format only popular by some groups in the anime scene. Intended to be played on a PC.
And it is also not 10bit color like in HDR but 8bit expanded to 10bit to reduce especially banding on highly compressed video streams.
So sacrificing compatibility with any hardware playback device for the sake of the file size was the initial reasoning. Rendered mute since many years, when the over compression with BD rips stopped, but still using Hi10P. Naturally Anime scene is early adopting HEVC now because it says 10 bit, even if the sources were never 10bit to begin with.
But well, it’s the Anime/Fansubber scene, what do you expect?
The fun thin is: the banding is already there on most sources, so the 10bit encoding did nothing at all beside compensating for artifacts introduced by over compressing files. Proper solution would always have been: do not overcompress video streams…
Best option: transcode or get a decent rips.