I think you shouldn't watch the video.
Play it after the sheets, even though it will be a pain in the butt at first, you will have to learn how to sightread one day or you will regret it.
Better start right now.
Also, how cool wouldn't it be to complete your piece only by reading the sheet paper?
Probably small mistakes will occour, but you can always watch the video only AFTER you tried to figure a section out yourself.