The photo-sharing service Instagram is taking its time getting into sponsored videos. Early advertising partners with which it has experimented with the format include Levi’s, Ben and Jerry’s, Burberry, and Starwood. Said Jim Squires, Instagram’s director of marketing, “Video will be a natural addition from an ad perspective.” But he added that owner Facebook is taking its time with Instagram video ads, which, Squires said, is “still a ways out."