Dashing.io Widget for UnifiVideo NVR
This method uses API Key access so I suggest you setup a guest account with API access but limited (Visible and View Feed) access. Then login as the guest user, enable API access, and generate a new key. Copy the key for use.
Switch to the Devices tab and open the Configure dialog for the cam. On the Details tab, right-click the thumbnail view and Copy the image URL to the clipboard. It will look similar to the following if pasted to an address bar or text editor: http://192.168.1.105:7443//api/2.0/snapshot/camera/05a2bc63-d1ce-399f-8327-3a19b0cd3e8f?width=%d&force=true
The guid after /camera/ is what you want to use in the unifivideo.rb file.
You can setup as many cameras as you want, just keep adding settings.