Omnisphere Explained Groove3 video - $5

http://www.groove3.com/str/omnisphere-explained.html

Omni means 'all' or 'every' and sphere is a solid geometric figure generated by the revolution of a semicircle about its diameter; a round body whose surface is at all points equidistant from the center. Equation: x 2 + y 2 + z 2 = r 2 or any rounded body approximately of this form; a globular mass, shell, etc.

That may save you $5.
 
I do own this video and it's worth $5 to a newbie.

Spectrasonics has a number of free videos that explain a great deal about their various products. I found the Omnisphere tutorials very helpful. http://www.spectrasonics.net/video/videos-tutorials-omnisphere.php

Watched the first three sections yesterday.  This is a top-notch production.  The material is organized and presented with utmost clarity.
 
For five bucks, this is a steal ... provided you own Omnisphere, of course.  If you do not, purchasing this will be really, really expensive as you'll be compelled to spend another $450 to buy Omnisphere.