Borussia Dortmund is considered a talent factory in world football, few clubs develop young players into international stars as consistently. The documentary “Dortmunds route to greatness: Reyna, Campbell and Albert” follows three Americans. Gio Reyna, Cole Campbell, and Mathis Albert all made the leap from BVB’s youth academy to the Club World Cup. It offers a behind-the-scenes look at an academy where dreams come true.