to work for free, to work without pay or other compensation / to work in vain, to work with no favorable end result

(archaic, grammar) any word that declines or conjugates / (archaic, grammar) more specifically, a verb

film director

cinema, movie theater

live action film

action movie (a type of motion picture)

horror movie (motion picture which horrifies or frightens)

pink film, a partially-censored pornographic film, film erotica, a blue movie

creature feature, monster movie, kaiju film

documentary (documentary film)