Do Book Trailers work?

Creating a video book trailer for books seems to be all the rage now among authors. Many hire someone to do the work for them. Others, like me, attempt to create them on their own. I use the free software that comes with Windows called MovieMaker, and truthfully, its fun to create a video that represents the book I've poured my heart and soul into. Perhaps its just a tiny sampling of getting to see my book in film (which is every author's dream, of course). So, in case you haven't seen my newest trailer, I'm posting it here for you to view if you desire. This is only the second one I've made, but truthfully, they do take hours to create. My question to you is this: Do you believe they are worth it? In other words, after viewing this, were you any more inspired to buy my book than before? Did it increase your enthusiasm? Did it leave you breathless, desperately wondering what you will do with your time until my book releases? (Okay, I've gone a bit overboard here) Anyway, I crave your opinions here, because I'm not sure I want to put in the time on these things if they really do no good. Thanks!