The YouTube description adds more:
"Performed with baseballs and a baseball mitt, "Brooklyn" was written in remembrance of a highly controversial event in baseball history: the "dropped third strike" by Brooklyn Dodgers catcher Mickey Owen with 2 out in the bottom of the ninth. This enabled the batter to advance to first base, the Yankees scored three runs later that inning, and moved on to win yet another World Series."That must have been a harrowing series to witness.
YouTube Link: blairzo: