How to set up VLC on Apple TV 4K to access files on Mac Mini?

I use a MacMini 2012 (OS Catalina) as media center, and record tv broadcasts using EyeTV hardware+software. The recordings are saved as .MPG or .TS files.

I recently bought an Apple TV 4K, and have installed the VLC app.

I have set up file sharing on the Mac Mini, sharing the EyeTV folder via SMB.

Now VLC can see the SMB share and when I try to access the share, I am presented with a login box.

But no matter how hard I try, I cannot get access :(

I fill in Username and Password (I have tried both my user account and my admin account), but do not know how to fill out Port and Workgroup. I tried 445 and the name of the Mac Mini.

I also tried "Anonymous login", and am presented with a simpler login box with only Username and Password - but it asks me to fill in the Username in the format DOMAIN;username. Again I am lost.

Question

Any help on where to find the information VLC needs, or how to set up the sharing on the Mac Mini?

Thank you in advance :)

Screendumps:

Login from VLC:

Normal login:

Anonymous login:

Setup of the Mac Mini:

This issue is related to my previous question "How to share media files on MacMini with Apple TV", where I used the Media Sharing option of the Mac Mini - but I need a solution where I do not have to convert all my media files to another format.

https://discussions.apple.com/thread/252130504