Using the Mydlink cloud services I can view all 4 cameras remotely at any time.   Also, using the mydlink View-NVR application on my android phone I am able to view all 4 cameras.
However, I've tried on 3 different machines.  One Laptop running windows 10 using ie11.  One Surface Tablet with windows 10 using ie11 and a desktop computer, windows 7, ie11.    The laptop and the desktop both want to but will not install an Active X control.  -- not realy an issue because I want to use the tablet.
The tablet brings up the DNR web pages fine, however the 4 camera grids are solid black.   Any suggestions on what settings I may have wrong on my tablet or the other machines?