Great course! I'm using it right now and it's some nice hands-on practice.
One nitpick: In video 14 about references vs copies, around 2:20, you say, "`team` is not the array, `team` is just a reference to the original array, which is `players`." It's a little ambiguous but to me it sounds like you're saying that the variable `players` is somehow special and different from the variable `team`, as if it's not just another reference to an underlying array. This seems like it could confuse newbies.
One nitpick: In video 14 about references vs copies, around 2:20, you say, "`team` is not the array, `team` is just a reference to the original array, which is `players`." It's a little ambiguous but to me it sounds like you're saying that the variable `players` is somehow special and different from the variable `team`, as if it's not just another reference to an underlying array. This seems like it could confuse newbies.