NEW YORK: Twitter’s live video-streaming application, Periscope, has hired an Editor-in-Chief, Evan Hansen, who says he plans to showcase the best content and help develop the platform. Hansen himself revealed his appointment to Periscope, which lets users broadcast live video free of charge from smartphones running Android or Apple iOS software. The videos remain available for 24 hours before disappearing. “I am joining Periscope as editor-in-chief,” he wrote in a farewell blog on story-sharing site Medium where he is an editor.