I have just completed four videos on Leadership 360 degree assessments with training on how to use and administer the assessment that I offer at Assessments Here. The training is over 100 minutes of straight content. Here is a two minute video highlighting what is covered. It is now for sale as a product.
There are two purchase options as outlined here: http://www.assessmentshere.com/2011/07/video-training-series-on-leadership-360/. Video overview will take about 10 seconds to load.