A "message movie" is a film that tries to convey a specific moral, social, or political message to the audience. It aims to make people think or reflect on a particular issue or idea through its storytelling, characters, or plot. Full definition
There are two messages this movie presents: The ones you love can never be replaced, and two, love is not always true. (metacritic.com)
The official Oscar submission from France, rather than Agnes Varda's Faces Places, Robin Campillo's BPM (Beats Per Minute) is a very long message movie about the struggle in the early 1990s to recognize HIV and AIDS as an actual crisis. (combustiblecelluloid.com)
A lot of message movies in this category, yet I choose the clever lark with no grander meaning outside of itself. (nextprojection.com)