The Globe’s Mark Feeney alerts readers to the latest video teaser (or ‘snippet,’ as Mark calls it) for Ken Burns’s upcoming ‘The American Revolution’ documentary. The latest video focuses on the Battle of Bunker Hill. A previous video was released earlier this spring to commemorate the 250^th anniversary of the Battle of Lexington & Concord. … Rick Atkinson, the historian, is featured in both videos. I loved his first book on the American Revolution (‘The British Are Coming”). But I’m going to wait to buy the second book in the trilogy (“The Fate of the Day”) until the price comes down a bit. The current $36.59 is a little steep even for this history buff. … Screen capture above via PBS.