how to play videos on my secondary screen on a twinview setup?

Hi I've tried all in these last 6 months, I've read so many posts and tried all vdr options and plugins. Currently to watch videos on my secondary monitor I use softhddevice with the plex plugin. but with some videos there are av async problems and it's very annoying so I've tried the xineliboutput and the plex plugin work perfectly but xineliboutput work only on my primary screen and not on the secondary. so I've tries the mpv plugin but with it, it's not possible specify the screen ( the --geometry option is missing) so it work only on the primary screen. does someone have a workaround to the problem?