That's what we'd thought about unboxing videos too. But as it turned out, a lot of the potential customers don't bothered to read or inspect our sprues closely, thus not fully understand what is in our products. We have many feedback regarding how useful these videos are; that's why we are making them ourselves too!
Think it is for a different kind of audience. Most unboxing videos are followed by a painting video, so it is worth the time and efforts.