The porn video tag "3d-sexvilla" refers to a type of 3D adult entertainment. In this case, the term is primarily used in reference to a specific virtual reality (VR) game called SexVilla 3. This game, developed by 3DXplorer, features highly detailed and realistic 3D graphics with interactive elements that allow users to explore various sexual scenarios and customize their experience. Users can immerse themselves in different settings, characters, and activities, making it a popular choice for VR enthusiasts seeking adult content. The tag "3d-sexvilla" is used to identify videos or experiences derived from this game or similar 3D adult simulations.