The default colourspace is YCC 444, 10 bits. Vero will output RGB only if
- the display does not support YCC
- a VESA display mode such as 1024x768 is selected, or
- the user selects RGB output in Settings->Display (visible in Expert mode)
Vero will output YCC 422 if:
- the display’s HDMI cannot handle the output mode at 444, or
- the user selects 422 output in Setiings->Display
Vero will output 420 if the output mode is 4k50/60hz and 10 bits.
Vero will output 8 bits only if the display does not support 10 bits and the output is RGB.
As I posted above, there’s no indication in your logs that Vero is not outputting YCC 444 10 bits. Note that the colourspace of the source media is irrelevant to what Vero outputs. If you are playing 8-bit video, IIRC Vero dithers the extra 2 bits when outputting 10 bits.