Martin Fabians Longsword playlist (currently a 5 videos [one reupload]) 1) The Best Nachschlag 2) En Garde 3) Liar Liar 4) the Lazy Workout 5) Secrets of the Streich

I must say my three favorite are the Lazy workout (a great strength and techqnue building set of drills) En Guard (discusses guards) and Liar liar (discusses feints and controlling your opponent.)