What Is Your Recommended WordPress Plugin For Creating A Video Course And Measuring Growth?

In episode 181 of Semantic Mastery's weekly Hump Day Hangouts, one participant asked about the recommended WordPress plugin for creating a video course and measuring growth.
The exact question was:
Which Plugin to be used for creation of a Video Course on wordpress helping even with the measureabilty or growth eg gymnasticbodies.com is the best example…?
