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that DVR has no PoE ports so is (most likely) not NAT'ing your cams' Ip's.
Best bet is to point BI at each cam's IP directly. The NVR may have RTSP URL's available for each cam, but better to pul the streams to BI from the cams directly. that way, BI and the NVR can each act independanty, and if one has problem, the other will still work fine...
edit: on closer inspection, i see that system has WIRELESS cams (ug!) that connect to the NVR, (and perhaps not connect to your normal wifi network). did i say 'ugh!'? in that case, you will need to find the RTSP stream URL provided by the NVR for each cam...
edit again: you may be S.O.L. that system appears to be a 'cloud only' sort of thing, and may not even have local RTSP streams availble for access from BI at all.