We celebrate presidents day to honor are past presidents. Before 1968 we celebrated only two birthdays. George Washington's birthday and Lincolns birthday. In 1971 the law took into affect and people started to celebrate not only to celebrate two presidents but all the past presidents.
The purpose of the music video was to tell students that school was closed. From the paragraph it says that "the video was planed a week before the snow." According to head of the school "students should read a engaging book or two." I personally would play video games and invite my friends over on my snow day.