When i start mpv with --no-border then i can't resize, move or maximize the windows with the options given by the window menu (XFWM) or keyboard shortcuts.
What do you expect mpv to do? Moving and resizing is the window manager's responsibility.
I'm not sure exactly what the problem is. What window manager are you using?
On openbox (and as far as I know this is pretty standard)
Alt-[drag mouse left] : move window
Alt-[drag mouse right] : resize window
Well, I'm closing this, since there are no further comments and this can't be "fixed". It's up to the window manager too.
I just found a work around for this. In Linux (Linux Mint I am currently using), there can be a keystroke for resizing a window. In my case it is alt-F8. This centers the cursor in the movie window and any movement will resize the window. Works quite well!
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I just found a work around for this. In Linux (Linux Mint I am currently using), there can be a keystroke for resizing a window. In my case it is alt-F8. This centers the cursor in the movie window and any movement will resize the window. Works quite well!