Provided are a plurality of cameras (96) mounted to an upper swing structure (12) so as to be capable of shooting in different directions, a video storage device (99) for storing videos taken by the plurality of cameras, a controller (40), and a hydraulic excavator (1). The controller has a camera selection section (40a) which when a lower track structure (11), the upper swing structure (12), or a work device (1A) makes an operation, selects a camera in accordance with the operation from among the plurality of cameras (96), and a storage control section (40b) which stores videos taken by the camera selected by the camera selection section (40a) during the operation of the lower track structure, the upper swing structure, or the work device in a video storage device (99).