The trailer enable the older generation to go back to those days in a time capsule manner.
As for the younger generations, they were able to learn a bit of history, see how this movement came about and ultimately appreciate key individuals, Ruth Shack and Robert Kunst, for speaking out, making a difference and their mark in Gay Rights history. And thanks to them and Anita's crusade that led her to

Let's get read of guns in this country. We are not anymore cowboys and Indians. Enough is enough.

Liberty and the Persue of Happiness equal to Marriage Equality