The long-awaited Content on Demand (CoD) service in trains will be launched this month, said a senior official of Railway PSU RailTel on Thursday. The service involves infotainment in moving trains by providing pre-loaded multilingual content, including movies, news, music videos, and general entertainment. In order to ensure buffer-free services, media servers will be placed inside coaches, RailTel CMD Puneet Chawla said in a press briefing.