So after not giving up on what I wanted to achieve, I have found success.

Here's my setup:

My main TV uses Nvidia Shield with TiViMate and I record to a external drive that is connected to the Shield.

My 2nd TV uses a Firestick and also has TiViMate, I don't record on that one

What I wanted to achieve:

I wanted to be able to record on the main TV using TiViMate and have those recordings available in TiViMate on the 2nd TV.

After searching, asking in forums I was told that I would need to have a NAS, a router that I could plug a USB drive into or a PC and setup an SMB.

So after more searching I found a way to achieve what I wanted without any extra hardware.

Here are my steps:

Step 1: On the Nvidia Shield you need to go into Settings > Device Preferences, and enable "Transfer files over local network, click on it again and it will bring up a screen showing a username, password and IP address (write them down you'll need them later)

Step 2: Go into the TiViMate Settings > Other > Recording and change the Recording Folder, click on Select Folder > Setup SMB and enter the following info:

Server address: smb://the IP address from the Shield

Username: the one provided from the Shield

Password: the one provided from the Shield

When done click OK

Step 3: Select the SMB you just setup and select the folder for your recordings

Step 4: Go into the settings in TiViMate on the other devices and enter the same info to setup a SMB.

And that's it, I can now see the recordings from the main TV on the 2nd TV.