There are two bugs in RC2:
- Some VP9 HDR content that does not have Content Light Level (CLL) metadata still doesn’t play in HDR. (The Redwoods and The World In HDR demo videos that you can find on the kodi wiki)
- The Luminance metadata was not passed correctly to the kernel, which in turn must have used nothing or a default value.
- Chromaticity was also completely wrong, but it has been fixed and should be correct now.
These 2 issues were fixed and will be included in the next nightly, and also in any future stable build.