i am talk about TECHNICAL
,this video are "home make" with x.265 encoder , not true demux plus extra audio .
True BD 1:1 rip and true UHD remux / UNTOUCHED work without issues .
but looun ,sorry, the uhd remux are only video track ,and i can mux with any language....
plus , the uhd stream , are encoded in x265 format ...and in "main level 5 high"
and i dont understand what you mean...
this is a example about video stream in a iso full uhd (not fake not remux,real full iso)
Video: MPEG-H HEVC Video / 55343 kbps / 2160p / 23.976 fps / 16:9 / Main 10 Profile 5.1 High / 4:2:0 / 10 bits / HDR / BT.2020 /
you can read "Main 10 Profile 5.1 High"