Amazon (AMZN) could potentially spin off its Prime streaming unit as a separate company, CEO Andy Jassy said Wednesday. During a wide-ranging interview at the The New York Times’ DealBook Summit , Jassy said that “overtime we have opportunities to make our Prime video business a standalone business that has very attractive economics.” Jassy also defended the Club holding’s decision to “streamline” costs by laying off thousands of employees , highlighted shifts in consumer spending amid an uncertain economy, and made clear Amazon’s intention to continue expanding into the health-care space. The Club welcomes Jassy’s comments on reining in costs, as well as its measured approach to building out Prime. Layoffs and expenses Jassy said Amazon’s recent decision to layoff roughly 10,000 workers is part of an effort to generate more efficiencies across the organization. But he said “it…