Would try these 4 first 
rtsp://username:password@ipnumber/ch0_0.264
http://username:password@ipnumber/snapshot.jpg?user=[USERNAME]&pwd=[PASSWORD]&strm=[CHANNEL]
rtsp://username:password@ipnumber/onvif1
rtsp://username:password@ipnumber/ucast/11
But I do not know if it refers to NVR, Camera or even other models from Zosi.
I suppose first 2 for the NVR itself (as it refers to the channel nb).
Maybe the 2 other for the camera directly…