mpv_351_workaround - solution for #351 issue mpv-player/mpv#351
cp /usr/share/examples/mpv/input.conf ~/.config/mpv/input.conf.1
change keys in ~/.config/mpv/input.conf.1 as you want, but don't remove lines
you can add your keys into the end of ~/.config/mpv/input.conf.1, it will be override keys above
comment lines will uncommenting automatically
before use should launch ./install script