It’s fifteen seconds of Jonathan Strange and Mr. Norrell
Don’t worry–it’s a different fifteen seconds from the last clip–and it shows a teeny bit of the Castle of Lost Hope.
Jonathan Strange and Mr. Norrell is a seven-part miniseries based on Susanna Clarke’s novel of the same name. It is set in an alternate nineteenth-century England around the time of the Napoleonic wars. Magic was once common in England, but is now apparently gone–all magicians are purely theoretical. Then, Mr. Norrell, after years of study, begins to do actual magic. Not too long after, Mr. Strange begins to do magic as well.
Jonathan Strange is played by Bertie Carvel and Mr Norrell by Eddie Marsan
Edit: And I just located another three or so seconds: