I think no one has mentioned “the man from earth”, it is a great movie that got a lot of success thanks to piracy, enough that it allowed it to even get a sequel (I haven’t watched it it seems to be far less recommended).

I recommend to just watch it without looking too much at the theme or plot. I’ll just say that it’s a movie with a lot of conversations and basically no action at all. You could compare it in that sense to the classic “12 angry men”, not in plot or theme, but style, mostly something that happens between a small cast of actors through dialogue.