Create a Rec 709 conversion lut for Rec 2020 footage

[SimrunTech]

After finishing Grading my Rec 2020 footage, I would like to create a LUT so that it can also be viewed in rec 709, SDR. Right now when I export the footage, I only get my graded HDR footage.

it looks bad on SDR monitors, I would like to have a 709 conversion lut created so that it can viewed on SDR monitors.

I'm trying to do this so when I upload footage to youtube, I can attach the 709 lut so that it can grade the conversion properly.

Here is what is happening with regular HDR footage:

Composite Arf Hawk RC Turbine Jet - 4K HDR - YouTube  looks good on HDR monitors but bad on SDR

So I have to re-encode it using rec 709 color profile and reupload as a 2nd file:

Composite Arf Bae Hawk Carf RC Jet - 4K SDR - YouTube

obviously not very practical, so what can be done here. Youtube says it offers a way to have more control over SDR conversion but needs a lut to do this with. the instructions are for divinchi resolve.

[R Neil Haugen]

SDR Conform by design must handle both gamut/space and dynamic range conversion. That's the reason it exists.

Neil