"My Movie"  mpv --really-quiet --no-audio --fs --loop=inf
                 --no-stop-screensaver
                 --wid=$XSCREENSAVER_WINDOW
                 $HOME/movies/*.mp4                       n

"My Movie"  vlc -L -R -f --intf dummy --no-video-title-show
                        $HOME/movies/*.mp4                 n