The idea is great. The story has potential. The facility design is superb. Your choice of music is excellent. However, I do have a few complaints.
First, the movement of your character didn't seem real. The running didn't involve the upper half of his body at all, and the walking barely fixed this. Furthermore, he didn't move like someone who knew how to handle that weapon. Not while running, not while walking.
Second, the design of the helmet severely limits your characters field of vision. Most modern and futuristic helmet designs avoid this issue.
Third, some of your photography direction could use some work. For example, when the character walks into the- let's call it a control room- when they walk into the control room, the camera could have been a few inches lower. About eye-level for the character would have been much better in giving the audience a sense of "being there".
Solutions for these: 1) Study movement of trained soldiers. If you don't have access to a soldier to help you out with this, then watch some movies made in recent years that feature trained soldiers holding long guns while scouting or other such military maneuvers. Even if the movie is bad, you can just fast forward until you find a good scene to study. Also, try to involve the character's entire body in their movements, especially when walking or running.
2) Change the helmet. This will qualify as a bit of a retcon, but it's worth it as I'm not the only one who brought up the helmet. Simply put, redesign it. Your character is obviously supposed to be a trained soldier, and so should have as LITTLE vision impairment as possible.
3) For photography and camera angles.... well, just focus on making the audience feel like they're there. If YOU feel like that, then chances are they will too.
Good luck on the next Phase.