It’s a composition in the style of Johnny Cash that’s meant to be funny. That’s parody.

That’s satire. In the US for something to be parody it has to be a commentary on the original work(s) or author(s). A parody of Johnny Cash would be something like if they used AI to copy his song note for note but had lyrics that criticized him for portraying himself as bluecollar in his music despite his wealth.

Parody receives higher protection than satire because the parodist is actually trying to make a statement. Most “music parody” like that of Weird Al is satire, which is why Weird Al asks for permission from the original artists.