A friend of mine who self-published an award-winning fantasy novel just told me he’s going to have a trailer made for it. I think I’ll pass these tips along to him. They’re worth considering even if you don’t do it yourself.
Creating a Book Trailer for Your Self-Published Novel | Self-Publishing Review
http://www.selfpublishingreview.com/2015/04/creating-a-book-trailer-for-your-self-published-novel/