I don't agree with downright everything in this video but I think it is true that Alien was about the wrong use of technology and AI, the growing power of corporations and how the Alien is a weird chimera between human, beast and technology. This is carried all the way to Alien Covenant, in which the evil AI, David, was responsible for creating the Xenomorphs:

https://m.youtube.com/watch?v=9cFnhVc9eak