Hello jurie,
Are you going to dance the entire song, or just an outtake? The reason I ask is that it sounds like you are a beginner, and a 4:15 song can seem like FOREVER if you are doing a show piece/routine and only know a few steps.... And if you are having trouble distinguishing the beat you want to dance to, perhaps another, shorter song with a stronger/clearer beat would do? If that's not an option, I'd suggest an outtake, a segment you feel the most comfortable with?