Based on the original osc
Install
oscc.lua into your mpv scripts folder
oscc.ttf into fonts folder, if you dont have - create one
Configuration
In your mpv.conf
osc=no
cursor-autohide=3500 #synchronized with hidetimeout
osd-bar=no
Volume seekbar could be disabled in osc.conf which is in script-opts
volseekbar=no