After going through a few of the memory cards and finding nothing out of the ordinary, I found one clip that does not fit with the others.
From what I can tell, this footage was recorded inside Alexa's apartment, not on the set for Alpha Decay.
The audio in this clip seems to be missing. Either the microphone on the camera was disabled, or the sound was removed afterward.
Cut from black to the footage. It is immediately apparent that the person behind the camera is moving, and quickly. The video wobbles wildly, pointing down towards the carpet as they run by what appears to be a staircase.
A strange blue line slowly tears through the middle of the image.
The camera continues to move, passing by walls and objects too quickly for any of them to be identified. The person behind the camera stops at a lamp, burning wild and orange into the lens. A girl's hand reaches around the camera to turn off the light switch, plunging the video back into darkness.
It is pitch black for a few seconds, but not much longer; the girl is still on the move. Now she moves toward a window. With the curtain open only a crack, it is the only light source available in the shot.
She finally reaches the window, pulls back the curtain and presses the camera up against the glass. It wobbles slightly before what she wants comes into view.
It is the middle of the night, and there is nothing else behind Alexa's apartment except for --
A exceptionally tall, thin, pale man wearing a business suit standing to the right.
In the split second before the shot goes dark, the man whips his head towards the camera.
He has no face.
It is a few seconds before the narrator's words appear on the screen again.
That was the only thing out of the ordinary on this memory card.
After seeing this clip, I will keep an eye out for similar occurrences as I continue.
Cut to black. End entry.
OOC NOTE. Plot, dialogue, and video sourced and adapted from Marble Hornets on YouTube. Watch at your own risk.