A simple fix I found for this is to undock the video from VLC (Tools ->Preferences ->Advanced ->Video ->"Embedded Video" = unchecked). Then you can move & double-click the video (independently from the control) to full-screen in whichever display you wish.<br>
I do agree that it may be preferable that it be able to act the same docked, so other answers please still respond.<br><br>Sincerely,<br>Ryo Kimball<br>