AT&T, which on Friday received final U.S. regulatory approval to buy DirecTV, will offer ad-supported TV streaming and mobile video products while building out its advertising technology, John Stankey, the AT&T executive named as chief of the company's Internet and Entertainment division, told Reuters. President and CEO of AT&T Operations John Stankey responds to a question from a Reuters reporter during a Reuters Global Technology Summit in New York May 14, 2010.