You might search for the following trainers on YouTube - Janice Gunn, Adele Yunck, and Connie Cleveland.
Michael Ellis has some great videos re: verbal markers, etc - click videos on The Michael Ellis School for Dog Trainers
Also, the puppygarten videos on the following site are awesome - Competitive Obedience Toolbox
Shyne & The Guardyan Sheps
PAM Guardyan's Gavin, VCD2, CDX, RE, AX, AXJ, AXP, AJP, TD
PACH Guardyan's Helki, CDX, PCDX, MXP3, MXPB, MJP3, MJPB