I realized after posting this that the local ip address of one of the cameras had changed. SO the DNR wasn't looking for it in the right place and thus it wasn't showing up. I'm not sure why the Camera app was able to locate it, unless it auto-scans. Anyway, I compared the settings of the two cameras and found the one that switched had port forwarding turned off. So I turned it on. I also reduced resolution to minimum and fps by half. I have been having issues with my router "crashing" where it still shows I have a strong signal but my wifi speeds are excruciatingly slow/ if at all.
Anyway, my question is, why is the dlink camera killing my internet. I have verizion FIOS, and I've turned video quality way down. Do I need to turn port forwarding on. Both cameras are set to the same port by default, 80. Should I change that? I should also mention that after resetting it with the new settings, the opposite camera that had the issue last time had the issue. It began flashing red on the back and I can no longer access it at the ip address that was set for it. I'll check my router settings later to see if the ip switched again, but either way, something funky is going on. Oh and both cameras are wifi connected by the way.