I watched (and enjoyed) the Exercise 1 video modules, and actually felt pretty good about the contents and my understanding of them. Then I flunked the first two attempts at the test. I'm not sure if it was the wording of the questions or what, but that was pretty frustrating.
I will say I still value the quizzes because it is a good test of terminology and rules that aren't always leveraged in our practical exercises, but if our only source of the materials is audio/video, then it forces one to basically transcribe the entire module each time in order to have proper reference for quiz completion. Or, maybe it's just me! LOL