Never rely on LUTs like that. They're made for LOG footage, but some folks make LUTs for specific non-LOG footage, and it's not reliable. Different lenses, different ISO, shutter angle, it will all make on LUT not valid for other shots on the same camera. A very well known colorist once called LUTs on non-LOG footage (he even hates them on LOG footage) the Lazy User Technique of color grading. And I agree.
If you have clips from a specific camera, all shot in the same location, from the same angle, with the same lighting, color the first one, copy, Paste Attributes to the others. Or use something like Coremelt's Chromatic or Denver Riddle's Cinema Grade plugins that support grading by groups.
As for metadata, most video cameras don't record it in standard ways, everyone has their own way of storing it, so to speak. You won't see many cameras outside of the iPhones that store that data in a way FCPX can access it in a standard format. You may find some third party app that gives you this information somewhere, I don't know.
But again, a LUT isn't going to do you tons of good, IMHO. I grade for broadcast daily, I've tried all the LUTs out there, I hate them all, because you STILL have to grade even if you use them. I can get better, cleaner results grading from scratch, watching my scopes and Viewer just fine, very quickly, very easily.
I'm sure others have differing opinions. Because LUTs are subjective.
