It could also be some combination of the three, for example a craft that is human origin but derived from ET bits being presented in a pysop manner for some reason. The Navy's claimed operable AGRAV/room temperature superconductor patents and Salvadore Pais[1] add another layer of huh to the whole thing.

[1]https://www.thedrive.com/the-war-zone/29232/navys-advanced-a...