Do it once, of course, and what will they come back to you for the next time …? You’d already have shown you have no regard for copyright, performance rights. An amateur might get away with it.
If they really want to do this, of course you could always get a list of desired scenes / movies, contact the rights holders, and ask them for a freebie for the church, or what might want to charge ..
Alternatively, you could suggest putting together a bunch of cameo scenes that make similar points, and filming them (with congregation members as actors? With local pro actors? ) …