katjoe, the coaches want well rounded student athletes. It's a scientific gamble for them. Sure, they want top athletes, but they also look at the "insurance policy", which is the other half of the deal - academics (ACT, SAT), social skills, leadership ability, and general "people" skills. NCAA has pretty strict eligibility rules, and coaches don't want a kid that they have to constantly baby-sit academically and coddle socially to keep eligible.
The way a kid behaves around her parents, team mates and coaches in summer can speak volumes for a college coach. So a little blurb (mini speech, 30 seconds or so) on your video can be very helpful in communicating her personality type. Skip the music, and put a polish on her presentation. Hope that helps, and good luck!