Has anyone worked out how to create OBJ files instead of USDZ?

In my app I'm trying to play an Apple Music video using VideoPlayer(player: AVPlayer(url: video.url!)) where "video" is a MusicVideo instance but all I get is a blank player. video.title and video.artistName work fine I've tried using fileURLWithPath and string also, which work with hosted videos no problem (apologies for the poor use of terms, newbie)