Hi not sure if this is the right place, but here's a great blog with youtube videos as well- by Yahe Solomon, 6th dan who was a student of first M. and K. Nakazono and then trained with Professor TK Chiba as well as living in Hombu and training and learning with the former Doshu, Yamaguchi Sensei, Arikawa Sensei etc. Please enjoy! Thanks! Sensei's emphasis is on proper posture, basic ma ai concepts, etc.
http://yahesolomonsensei.wordpress.com/