Novelist Lee Goldberg says most writers shouldn’t make book trailers. He does have a good point about the static slideshow ones; but that's not the only kind of trailer out there. There are some brilliantly creative things being done.
To other authors, Goldberg pleads:
"Why don’t you just go to the bathroom, take whatever cash you have in your pockets and flush it down that toilet?’ They are amateurish. They are nothing but slideshows with bad stock photos, too much text and creepy music."
That being said, he made one himself.