You are going to need music or narration to accompany your book trailer video. Just think of how odd a film sounds when the music hasn’t been overlaid to it. Music will add atmosphere, whilst narration will help tell the story.
If you are a musician yourself, then you can record yourself playing an instrument and overlay this to your video. However, if you do intend to do this, then try to achieve studio recording conditions as much as possible to avoid background noise. If you want a narration, then I would advise paying an actor to record it. If you’ve ever listened to yourself, you’ll know how horrible you sound to your own ears. An actor has been trained to inject some life into words, and they will do a much better job.
There are online free music archives and sites where you can download tracks to provide the soundtrack for your video, and this is probably the best option. However, as with photos, you must ensure that you have the rights to use the music for commercial purposes and that they are royalty-free. I used Free Music Archive to provide the soundtrack on my video. This site has a handy filtering system so you know whether the music you want is both free and legal.
Once you’ve chosen your track and you’ve ensured you’ve got the necessary rights and licenses to use it, you can apply it to your images. To avoid the music starting and finishing too abruptly, be sure to have the music fading in and out. This can easily be done in Movie Maker, under the button ‘Add Music’.
Make sure the music you use fits the images and the tone of your book. It’s no good having a heavy rock track if your book is a gentle romance.
I am a Copywriter, Proofreader, Virtual Secretary and Author.