If I have one SafetyCam and data logger, and forgot to map on the Web; continue to take trips and later map it, will I get the videos for the first trip ?

The datalogger and the SafetyCam need to be mapped in the UI for the trips videos to be captured. Incase not mapped you not be able to view the videos for the trip taken. In this case, the videos will not be shown for backtracked trips.