I am not a tech-savvy gal, and I was able to create a video preview for my book in no time at all.  Animoto is free, unless you want to create a video longer than 30 seconds.  If you need a lot of text with your images, Animoto is not for you.  But, if you want to share a peek at your illustrations and offer a bit of text, get over there and get going!  You can do it yourself, and save some money for your book launch party!