I think this is important for two reasons. One, it demonstrates that anyone can create a kit of their own using relatively cheap off the shelf parts. Two, this is going to be the new baseline. From now on kits that aren't at least as good aren't going to sell.
In the past year there has been an explosion in the number of vampire killing kits on Ebay and Etsy. Despite most of them being absolute crap they're still selling for goodly sums, creating a self-perpetuating cycle of mediocrity. Hopefully a video like this will help cause the dismally lame low end of the market to collapse.