I would change two things in this course: The introduction videos are not necessary as they are very short but do take quite a significant amount of time especially with the wrapping up with the logo at the end. If the student ends the video before it is finished (to skip the logo closing) it counts as not having been watched and that can slow down the studuying especially if the student is pressed for time. The second issue is frequently mentioning that something seems difficult but will be mastered eventually. This may seem like a good way to motivate those who seem overwhelmed but if said too many times, some students may feel underestimated, especially if they did not feel overwhelmed in the first place.