How To Write A Script For A Trailer. Also, don’t fill the trailer with too many spoilers, which might be tempting if you’re trying to fill more than 40 seconds. They’ll most likely watch it and if they’re gripped by the first ten seconds, they’ll keep watching.

Depending on the sort of video you’re making, you may need to cram everything into 15 or 30 seconds, or you could have a full three minutes or more to work with. Most promotional scripts are between 30 and 60 seconds long. Also, don’t fill the trailer with too many spoilers, which might be tempting if you’re trying to fill more than 40 seconds.