X.channelsdvr.net:8089

I assume the numbers/letters (notated as x) x.channelsdvr.net are tied to a specific account, correct?

Correct

Is there anyway to change this?

Change what?

Is there anyway to change the x (numbers/letters) associated with account?

I can change it for you, to another random string. But why do you need to change it?

I do not need it changed at this time. I was showing a neighbor the setup I have with HDHomeRun and ChannelsDVR. He wanted to try it on his FireTV 4k so I was going to login in at his house then realized I did not want him to have access to my account.

You can always hit logout after you demo it.