I'm also really surprised to see the Xeno in the warehouse area. Normally it seems like the game was programmed to discourage that, because I've only seen it happen to maybe 2 people I've watched, including you. That small hospital morgue area is closer to 70/30, where I don't think it's supposed to spawn, at least until you open up vent access, but I've definitely seen it spawn a few times. It's such a tiny area that I think it not spawning makes sense, because it would make the game a little too difficult.
Okay, the use and editing of music for recurring bits and one-offs like the airlock eject and the sexy back alien was an absolute 10/10 Criminally undersubbed
The Alien staring at the green light at 15:46 is a reference to a scene from the original script for Alien that wasn't filmed, where the xeno states at a blinking green light, fascinated by it.