The now much darker commercial probably isn't how Lincoln would prefer the MKC to be marketed, but really in a few of the actual ads, McConaughey already seems moments away from breaking into a full Rustin Cohle from True Detective impression. The cadence and tone of his voice are just so close to that character, especially in the one where he's talking to the bull standing in the middle of the road. It very nearly verges on parody anyway; Conan is just turning all of this up to 11.
It's a little surprising that the writers didn't dig a little deeper into the McConaughey oeuvre for the parody. Maybe McConaughey could have taken the MKC for a party at the Moon Tower from Dazed and Confused. In any case, it's worth a quick watch, so check it out.