YV12 input hevc encoding also no hdr flag

[lazyjss]

Staxrip question
When i select the h265 Nvidia encoder the input color space is always yv12.
I am new to this and if someone would be kind enough to let me know if this is ok for my use.
It appears to signify 4:2:0 in what i can find online.
I am encoding my blu rays and my uhd blurays with a turing nvidia card into h265 hevc.
From what I can tell everything appears ok on the finished product.
AVS automatic changed to ffvideosource once i load my media.

Should i be on the look out for anything particular on my media when using this input yv12?

Also I have updated staxrip and there is no longer a hdr flag in the h265 nvidia selections, is this an issue?

Thank you for any wisdom shared