This video illustrates Estilo de Fondo style in the Giron Arnis Escrima system of Filipino Martial Arts.  Estilo De Fondo:  estilo is style, fondo is anchor.  In Filipino terminology, Estilo De Fondo means to hold your ground or anchor yourself in a solid position.  This may be called a blocked or closed style, like when a door is closed, one must either use force to break in or look for other openings.  The weapon of application is a bolo knife.  This style was used by Grandmaster Leo M. Giron as a back-up fighting system during World War II in the jungles of the Philippines, and is the foundation of Giron Escrima.