A composer or a performer can add expression to his music by bringing out deepest feeling into it. A composer may express emotion by introducing two methods, allegro con brio and adagio cantabile, which means by playing fast or slow. A composer may also use pitches and rhythms which would be in his personal preference to bring out the passion excitement towards the audience.
premier means first in importance, order, or position; leading. so no it doesn't change anything it just means it would be your first video or an important first video
