How I use my terminal

So, he uses tmux on Windows? How does that actually work? Can someone elaborate on it?

I believe he is remoting into a Unix system to do his actual work. The Unix system can have tmux installed and running on it perfectly fine. I've done this too, to the extreme of SSHing into my own Virtualbox VM just to get that perfect compatibility layer that WSL still can't quite match.

Indeed, this is one of the strongest arguments for tmux versus other approaches to this problem. It can run on the server you're remoted into and still do its job. https://hiandrewquinn.github.io/til-site/posts/tmux-is-worse...