I think this is sort of missing the point of the original video--which wasn't about "hey every person in the world is judged on an art scale to 1-5" but is more about "how can I see better what can I do to level up my own art"
Especially since so many kids have like actual, serious, pent up issues about being graded their whole lives on a number scale (personally I couldn't look at my grades until 6 months after the fact because it filled me with so much anxiety), I'm just gonna pop in here to say that grading art between 1-5 is not actually a thing in art, and just a technique just this one person made up to help explain different ways to render and compose pieces. This is not a science and we don't even use a number scale like this in art school.
And I mean most people here DO get that, and the video does list good ideas for improvement, I'm just piping in for any kids reading this who are feeling really bad because they feel like they're a "1." What that chick in the video judges as a 1 is, in fact, the range of most High Schoolers (I know this because I'm a professional doing this 10 years and I work with kids). In High School I was a "1." I was a 1 until I started art classes in college. (I used Corel painter and MSN paint until Junior year of college) Y'all are fine and you are making good progress. You are not a "1." Keep drawing.