Is there a way to add feature that would select a PREVIEW TRAILER from a movie that has an equal or lower rating. This would only present PREVIEWS to your audience that were not rated above the selected movie content.
It’s already working that way. Provided your movies have correct ratings on them.
Early 2021 clean-up: implemented
From https://support.plex.tv/articles/202934933-cinema-trailers-extras-plex-web-app/
Note : The available pool of trailers will be based on the rating of the movie being played, if the movie has a US content rating (e.g. if you play a PG movie, only G or PG trailers will play). For other movies, the trailers will be restricted to trailers of G, PG, and PG-13 movies. In rare cases, this means there might not be enough trailers available to play the number you selected.