[The video feed is very brief. The frame starts out at an angle, since Souji hadn't really meant to record this, with a mirror at its center. The word "WELL?" is written in very precise handwriting.
The mirror gets closer as Souji walks over and as he kneels in front of it and sets the camera aside, the feed briefly shows a rather grisly image. A yellow parakeet is laid out on the floor in front of the mirror, positioned on its back with its wings outspread. There's no blood, but the bird has been cut open and the flesh and bones cut away entirely to reveal carefully displayed organs. It's hard to tell, given how briefly the camera shows it, but the bird's heart is still beating, and it's still breathing.
Then the camera's sitting to the side and Souji's in the frame now, just looking at the bird. His eyes are wider than normal, but otherwise, his expression is neutral. After a second, he moves, bringing both hands together in front of him, but rather than pick the bird up, there's just a very small snapping noise as he breaks its neck off screen.
At the very edge of the frame, a flurry of writing starts to appear on the mirror's surface, but the angle makes it impossible to make out any words.
omg I'm so sorry for the tl'dr]