Overall the video is clear and I like the basic explanation. Makes it seem like statistics is less daunting of a challenge. Not sure how to rate the completeness of the tutorial As someone who is new to statistics, its not clear how the n-1 eventually became a 4.
Looks good. Video a bit hard to read, but serviceable. Might help to add a bit of explanation about what a standard deviation does? Can these be put together into a min-curriculum?