I had the same question.
I ordered the CEC package for IDEA World 2015. If yours is anything like mine, i had to go to my videos, select the video; on the page with the presenter bio, outline, etc I found the “enroll” option. That sent me to a different page that said something like 0 of 2 steps completed. Then I was allowed to watch the video….
I was playing around trying to find out how many CECs I earned per video & for a course # or Cert # for ACE (which I never found) & found a way to access the test. Couldn’t tell you how I did that! The option was something like “skip to test”.