: Use the exact same color grade on your Instagram photos as you did in your YouTube videos.
The 3D data from the Cube file is wrapped into a "Color Lookup Table" (CLUT) within the XMP structure. convert-cube-to-xmp
Because XMP works via sliders and curves, you are less likely to get banding than with a poorly quantized CUBE. However, extreme LUTs may cause posterization in Lightroom because ACR processes in 16-bit, not 32-bit floating point like Resolve. : Use the exact same color grade on
You will lose some mathematical precision. A complex 33x33x33 CUBE contains 35,937 color coordinates. An XMP profile approximates this using curves. For a highly stylized "Blockbuster Teal & Orange" LUT, the result is nearly identical. For a technical "Rec.709 to Log" conversion, the XMP will be slightly off. However, extreme LUTs may cause posterization in Lightroom