Maury Povich has gone full 2010 James Franco lately, revisiting his 1990’s on-air paternity-test days with Ricki Lake on his new podcast a few weeks ago and then one-upping the meta-ness with an appearance last week as himself — serving up a lie-director test to settle a Pinky-Phaedra argument — on  The Real Housewives of Atlanta . Now he’s taking the cheeky reflexiveness to a new level, dropping a 15-minute three-segment parody that doubles as an ad for a creative-backoffice AI company called Air. Povich shot the sendup last month on a soundstage in midtown Manhattan, where a crew rebuilt the set from his longrunning syndicated staple  Maury  (rebranded here as  On Air With Maury),  marking a return of sorts after four years off the air. “I haven’t opened up an envelope in four years,” he tells  The Hollywood Reporter , referring to his infamous on-air paternity reveals. “So it’s good.” All three segments make thematic use of AI, but it’s the first that leans in hardest.…