Book trailers are normally created in a wide aspect ratio (16:9) which is ideal for platforms like YouTube, Amazon, Facebook, etc.
But recently, short form content on TikTok, Facebook Stories, etc. has been getting a lot of traction. This type of content is viewed on mobile devices and is therefore formatted in a vertical aspect ratio. Here are examples of the same book trailer formatted in two different ways.
@bookvideo Cozy murder mystery with a killer twist!!🤯📚 #booktok #indieauthor #bookworm #bookish #murdermystery #readersoftiktok ♬ original sound – Candice’s Booktok 📚