A word of common-sense advice:
When your site is disarmed, someone could take a paper bag and slip it over a camera without triggering the camera tamper accelerometer, blinding the PIR and rendering that camera useless for detecting an intruder. Same goes for a carefully placed sheet of plywood or drywall that blocks the camera’s view or even an accidental placement of materials that does the same thing. Many construction site thefts are done with the help and/or knowledge of an employee or subcontractor who works at the site.
Make it a routine to look at every camera before arming your site to ensure someone hasn’t intentionally or accidently sabotaged or blocked the Videofied cameras for an after-hours break-in. This habit could save you from losses which would have been undetected by the cameras.