LONDON — Britain’s shortest-serving Prime Minister Liz Truss is launching her own YouTube show. She wants it to be the home of a “counter-revolution.” “The Liz Truss Show,” which launches Friday, will be a “bold new program in a media landscape dominated by groupthink and timid consensus,” a press statement announcing the show declared. She will be “taking the gloves off,” it added. Truss, who spent just 49 days in office before being ousted by her own party, has been active on the lucrative U.