Video viewings are becoming an essential tool in many real estate agents’ toolboxes, making it easier for clients to choose their new home without having to set foot in it first. At Extell-developed One Manhattan Square, several of the building’s Lower Manhattan apartments for sale—each of which comes with the benefit of a 20-year tax abatement—have been purchased without so much as a client walkthrough. This comfort with online tours and sales extends to international buyers as well.