http://www.youtube.com/watch?v=CNAlfwK5C_Y
http://www.youtube.com/watch?v=IaIKXjqLYlo
http://www.youtube.com/watch?v=n0R7t90caTE
http://www.youtube.com/watch?v=PyKOk2dQHq8
With these, most of the YKT has been release in this forum in details. with writing and video.
The basic YKT theory and the drills are all presented as it is an educational process.
Enjoy!