Cary Knoop wrote:HLG works just fine with the Decklink 4K mini, as long as you have the ability to explicitly set your monitor device to HLG. Consumer monitors likely will not do that as you cannot override the input signal.
The only thing annoying is if you set "Enable HDR metadata over HDMI' it sends HDR10 info over the HDMI even when your output color space gamma is a HLG variety. What it should do is look at the 'Output Color Space' and determine based on this what to send (if anything at all).
This is the point.
Most consumer TVs have no manual switch, so you are on mercy of auto flagging.
In terms of actual data- HLG or HDR10 is just a normal 10bit (or 12) data, so it will work even with older HDMI (if you have ability to manually set TV).