The Royal Opera House’s archive of opera and ballet performances is being made available to audiences across the world, enabling subscribers in 95 countries to instantly start watching. More than a million people go to performances by the Royal Opera and Royal Ballet in Covent Garden in London each year. Now people in countries as far afield as Brazil and China are able to watch its productions, both historic and recent, online. Each recording can now be streamed from a large archive. James Whitebread, the ROH’s chief technology officer, said: “We’ve got a very large catalogue of past performances that...