Lorex DVM2050 Owner's Manual page 45

From the Add Action drop-down list, select Record video and press Add. When the Video
Record Action dialog opens, input the following information:
Duration: 20 seconds
Continuous Record: unchecked
The Video Record Action Dialog will look like this:
Running Test will immediately capture the pre-specified 20 seconds of video, and will store
the video capture in the default video record file.
Digital Video Security System Start Up Guide 42