When deciding for such a kit you need to consider if you want to be able to monitor via internet. In this case double check the DVR how it produces the output and allows a browser for viewing.
Most low-end DVR have the html-page you want to access stored in a CMOS chip and you are unable to alter anything. Producing the viewable page is achieved via an ActiveX module, which you cannot install in the Safari browser (all MAC), iPhone or Symbian based phones.
So, viewing is not possible with these devices.
Further, the back-up creates a file with the ending .in, beside a little viewer program which the viewing device will also download from the DVR, there is no program which can open this back-up file. Only this little view-program can save the file as an avi file, a lengthy process and again, not on any Apple device.....
Only my personal experience when I bought first the wrong equipment.