TVEverywhere Desktop Client

Is there a desktop client for TVEverywhere or some sort of program connected to it? I currently have the DVR server site open on my Chrome browser, but Chrome isn't the primary one that I use, and I feel like every now and then when I tab away for ours, I end up having errors on my recordings. Is there a better way to prevent that?

You can use whatever browser you want to access the DVR web UI. It doesn't affect TVE

Then what prevents it from having errors or snags in the recordings?

Depends, what are the errors?

What is the setup? Is it recording to a USB drive or something else?

Most of them, the ones that have failed, have been the " [Astits: fetching next packet failed: astits: fetching next packet from buffer failed: astits: reading 188 bytes failed]" error.

Yes, it's recording to an external USB drive.

I record to USB hard drives exclusively with no issues such as you're having. I will note that they use USB 3.0 or better ports and cables. I submitted the text of the error you reported to Google AI and it returned a very lengthy reply with the below text as the generic explanation: There's a much longer explanation and troubleshooting suggestions that follow.
The error message "Astits: fetching next packet failed: astits: fetching next packet from buffer failed: astits: reading 188 bytes failed" generally indicates an issue with network connectivity or a corrupted/interrupted media stream. The astits library is a Go library for reading and writing MPEG-TS (Transport Stream) packets, which are exactly 188 bytes long. The error means the software (e.g., Channels DVR or MediaMTX) could not read a complete, valid 188-byte packet.