The audio is bad enough that the transcribed text is wrong. Please make and enforce some minimum standard for recording quality, especially when it is in a course that is exclusively for an expensive IBM product! (Out of all of the course videos I have seen so far, this is easily the worst quality and presentation)
The review questions are also glitchy, it forces the user to reset the question and then resubmit the final. But in some cases, the answers have moved positions!