A 1968 black and white american horror film by George A. Romero.
About this movie: en.wikipedia.org/wiki/Night_of_the_Living_Dead
More on archive.org: archive.org/details/NightOfTheLivingDead_228
This film has fallen in the public domain. This original copy is licenced under Creative Common Public Domain licence (from archive.org) and is free to reuse, copy, share and for commercial use.