Andrew Wallenstein President and Chief Media AnalystVogue’s exclusive Met Gala red carpet livestream in September has set a template for parent company Conde Nast to repeat its success at future events, according to chief revenue officer Pam Drucker Mann.On the latest episode of the Variety podcast “Strictly Business,” Mann touted the big numbers — 16.5 million views and 54 million minutes watched — as proof positive of what she’ll be selling for Conde Nast’s other blue-chip magazine brands,