Earlier quoted context omitted.
mpv has a UI for things like seeking forward and backward, displaying info, etc. But you typically start it like: % mpv file.mp4 That's what they mean. It doesn't really have things such as "File → Open" like VLC has. At least not out of the box, but it's scriptable with Lua and there are scripts and even entire "alternative frontends" that can do this. It can also be remote controlled via a socket; I built an audio…
Thanks for your response. Understand. So MPV may not be for me, I don't know how to use a command line app, I remember have to use to fix an Ubuntu issue and the UX was painful to me.
If you set it as your default video player it will work as you expect.
If you don't want to set it as your default video player you can probably do something like "Right Click -> Open with..." and choose MPV.