Around 20 minutes the timer in the top right of the screen is counting the seconds, minutes and hours. However, the seconds tick by at a much slower speed than a normal second does.
At 37 minutes the security camera slowly zooms in on James while he's sleeping. A real security camera would not zoom in on anything without someone controlling it.
Despite this supposedly being a found footage movie, each night has a musical score, complete with orchestra stings to accompany the jumpscares.
The first night the main character starts recording, there's a loud thump in front of the stove. A crew member's fist can be seen just above the countertop at the same time the noise occurs, revealing the source of the noise.
After 47 minutes, James doesn't even check his security cameras for any phenomenon. He has had 3 nights to record and never mentions any findings on the camera footage.