Viewing CCTV wirelessly?

While I have no direct experince with that DVR, it would appear that its USB port is not meant for networking. You may want to consider an Ethernet-to-WiFi adapter such as this one:

Per Kenny:

No experience with DVR, but if the cams are regular IP cams I would hope that each cam has a web page built in to it and that web page could be accessed either by a browser or any one of many dedicated IP cam access utilities.

Doubtful. Just because you have a "(hardware) compatible interface" doesn't mean the software will USE that interface to support a particular functionality.

E.g., each of my NAS devices (disk-on-a-wire) have USB A connectors. So, your device could conceivably plug into them. I'd be very confident stating that it wouldn't "add a wireless capability" to them. Just like plugging a mouse into that same connector won't give me "mouse capabilities" (they wouldn't make sense on a NAS device -- no "display"!)

You can explore "power line modems/bridges". Think of them as *wired* extension cables that use the wiring in your home to transfer the data.

You might also be able to use a LWAP (light-weight access point) for the same job. (the powerline devices would be more "turn key")

I have only 3 cameras all on wireless, 2 outdoor, 1 indoor. WiFi router and NAS with surveillance station . Router and NAS sit side by side. I am able to remotely access the cameras if needed like while we're on holiday. I am sure wired cameras are much more stable. have only