Caligula Remake?

So, this is weird, and the more I read about it, confusing...apparently it's the trailer for a remake of Caligula directed by Gore Vidal, in which both Francesco Vezzoli and Courtney Love play Caligula (?) But then it turns out that it's not an actual film, just a trailer for a film that doesn't exist, sort of a joke trailer made for the Venice Biennale several years back. It's worth watching, if only to shudder at how awful it looks like it would be as a fully realized film.

Meaning no disrespect to Gore Vidal, whom I love and respect. Actually, as a sort of in-joke conflating the current worlds of Hollywood and high fashion with decadent ancient Rome before it fell, it's pretty satirical and funny.