This is a quick guide how to install and use your True Color LUT (or any other LUT for that matter). This guide uses Adobe Premier Pro video editing software as the example, however the principle is the same and this how to add a LUT guide should work for any software you may have.
The ideal way to use the LUT is to create a new adjustment layer above your video footage layer(s), then apply lumetri to that adjustment layer and then apply the True Color LUT to lumetri in that layer.
The following video explains this and how / where to store your LUTs so they are easy to select each time in the software.