This video covers the first part of the mission where you play as Mason. It ends at the cutscene where Resnov kills Steiner.
This video takes place from the beginning of Victor Charlie until the cutscene where you enter the tunnel and are handed the flashlight.
The second part of project Nova, this video covers begins on the boat, after the cutscene with Steiner and goes to the end of the level.
This video covers the first part of the project Nova Mission. It starts at the beginning of the mission and ends at the cutscene where Steiner is discovered sitting in a chair.