Your book trailer video is going to need some wording to explain what your book is about. This means writing a short script, and it is worth planning what you want your video to say before you actually start. This way you’ll know roughly how many photos you need as well as helping to determine the video length.
Regarding wording, don’t overload the image frames. Each frame will probably only last between 5 and 15 seconds, so you have to ensure that the wording is short enough to be read in that time, whilst effectively communicating a part of the plot. Try and keep the wording to short statements and use dramatic language to heighten interest. You’re selling your book, so you do need to be ‘salesy’ here.
If you’ve already had some good reviews, perhaps from beta readers or actual reviewers, you can include them on their own frame towards the end of the video.
You don’t want to make the book trailer video too long, otherwise viewers may get bored and not finish watching it. Try to keep it between 30 and 90 seconds.
Finally, remember to include a frame where you give the full title of your book and author name, as well as where it is available to buy from, such as Amazon or Waterstones.
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