Commonly used for promotional previews of movies, TV shows, and similar media.
After seeing the movie trailer, I decided I definitely want to go see it.
新番組の予告編が流れた。
A preview for the new show aired.
The trailer for the new movie was finally released.
I watched the trailer at the theater and became interested in the film.
The trailer for next month's movie release was posted online.
It's common to play several trailers before the main feature.