when someone films themselves opening up a product and then posts the video online, like on youtube. common themes in an unboxing video is to not show the person's face, to use an obligatory big ass knife, and to express some sort of satisfactory grunt when the product emerges from the package.
youtuber: check it out, here i will unbox a video game.
comment 1: wow. someone unboxing a video game.
comment 2: nice knife
comment 3: can you post a review?
comment 4: awesome unboxing