This is good fun to do, though time-consuming and actually more effective than you might imagine. It can be particularly useful in reawakening interest in your backlist. You can also do it completely for free.
The mechanics of it
I use the Movie Maker programme. However, this is now being discontinued so I'm starting to experiment with https://shotcut.org/
You may find other software that you prefer for creating videos but what I say below still all applies.
Approaches to the task
Your trailer really needs to represent your book. It should contain images, words, music and even short videos that capture the mood of the book. You might start with a front cover image. You should end with any acknowledgments and information about how to get the book.
Your trailer should never be more than two minutes long. Shorter is probably better.
Planning your trailer
The "story" will be somewhere between a blurb and an outline. It mustn't give the ending away. You should aim for twelve to twenty-four frames plus title slide and credits.
You might like to choose these before you choose the pictures. Remember, there is not all that much room for text. Consider direct quotes from the text, titles of individual poems and stories in collections and plot points. Sometimes you come across a picture that suggests something else. This is fine. Be flexible
A few words about pictures
These must be copyright free, the right size and preferably free of charge. You must really respect copyright. You could be sued for millions if you infringe someone's copyright.
Making your own or getting a friend or relation to paint or take photos will give you images that are free and copyright free. However, this may be time-consuming. A better alternative may be to use Pixa Bay:
Type a search term into the space, find your image, and click on the image you like. Your book / or story title can produce amazing results.
Once the image is open you can check the copyright. You really want to see the words "Free for commercial use. No attribution required ".
Occasionally you are asked to acknowledge attribution. This is easy. In the credits you create a section "Images by" and list any attributions.
Next, download the image and save it to your computer. Often the smallest image is the one you need. In the case of one I've just looked at:
https://pixabay.com/en/night-sky-summer-night-sky-black-1665026/ the 640 x 427 is good. The next one up may be a little too big, but often 750 X? is good. Try your image out full-screen to see if the picture has enough definition. If you're not happy at how it looks you can always go back and grab a larger one.
A few words about music
The same copyright issues exist for music as they do for pictures- though if you're sued it may be for billions, which you'll not be able to pay, and you may end up with a custodial sentence.
Commissioning your own piece would be prohibitively expensive.
However there is the Free Music Archive: http://freemusicarchive.org
This is a little more complex that Pixa Bay. You must go to "Curators" then "Music for Videos". You are presented with a search box and some filters. You should tick Creative Commons License, Attribution Only, Attribution-Share Alike, Public Domain, Allows for Commercial and Allows for remix or video.
If you have already made the rest of your trailer, you can also type in the length you want.
Then type your book / story title into the search box. If you have no matches, try refining your words. You may have to search just by genre. I found this:
http://freemusicarchive.org/music/Kai_Engel/Caeli/Kai_Engel_-_caeli_-_08_daemones_1095 by keeping all the filters mentioned above and just genre, "Classical". This has an Attribution License, so you must acknowledge the artist. It's easy – you put the name of the music, players and composer in the credits on your trailer. This is most often the case with music.
What to do with your trailer
You should upload it or provide a link to where you have it on You Tube to all sorts of places where you flag up your book. You Tube anyway is one place where you should store your video.
Here are a few others place where you may embed it or link to it:
· Your blog
· Your author Facebook page
· Your book's Facebook page
· Twitter - even though it may not prompt your followers to buy your book it will annoy them less than a "Buy my book" Tweet. It may amuse them enough to become more interested in you in general or in particular you as a writer.
· Your web site
· Various other places where you may list your book:
o Good reads
o The Society of Authors
o Amazon Author Central
And of course, put a link to your book in the description box on You Tube.
In a subsequent chapter I'll talk about marketing routines and also social media routines. You may at that point want to create yourself a rather longer list.
Trailers do make a difference to sales. They also often remind people of your back list as well.