absolutely go to a MAC counter... they are a great source of information.

i've seen some of the videos on You-Tube, don't know if they are the people you mentioned. in my October column, i actually direct people there for instruction on creating smoky eyes.
My blog:

http://labellatestarossa.blogspot.ca/

Little Mother of all the Roaches, President-for-Life of the MAC Harlots!