What is "dashcam"

n. an auto DVR (digital video recorder), a video camera (cam#Etymology 2) mounted on the dashboard of a vehicle, recording traffic ahead (e.g. for insurance claims)

A dashcam or dashboard camera is an onboard camera that continuously records the view through a vehicle's windscreen. It may be attached to the interior windscreen or to the top of the dashboard, by suction cup or adhesive-tape mount. Dashcams may provide video evidence in the event of an accident.