OSC - Windowed and Full Screen Help

[advice2020]

I apologize because I cannot seem to figure out what I am looking to achieve, which is leading to many questions.
With the OSC I have a desired WINDOWED setup and a desired FULL SCREEN setup that I would like to work together.
I use FS by default but at times would like to be able to shrink to FS down to a windowed mode, but am running into some conflicting items.

GENERAL INFO
-Linux Debian based distro / GTK based Desktop Environment
-MPV 0.35.1-4
-Using fullscreen by default fs=yes
-I am using “script-opts” in my mpv.conf file to achieve this.
script-opts=osc-timetotal=yes,.......
-Using “UMPV” script to only use one MPV window at a time

WINDOWED OSC DESIRED SETUP
-under media (not overlay)
-always show
-show as large as possible no matter how small window is

FULLSCREEN OSC DESIRED SETUP
-overlay on top of media
-hidden "auto" (show with mouse hover or keyboard toggle hotkey only)
-show as large as possible

I will post below some of the progress/issues I have run into with trying to get both desired setups to work properly together.

[advice2020]

-OSC under media / Used as overlay on top of media
With WINDOWED I tried the following which seems to work great
script-opts=osc-timetotal=yes,osc-visibility=always,osc-boxvideo=yes
however I do not want this in my FS setup, I want it to be an overlay.
Is there any way to distinguish the osc-visibility for WINDOWED making it possible to be different for FS setup? Or does anyone know of a different way to achieve this?

-Show "always" / Hidden "auto" mode
Similar to question above, for WINDOWED want to be able to always show but in FS mode I want the OSC to be hidden using "auto" mode to only show up with mouse hover or a keyboard toggle shortcut. Is there a way to set each to different setting?

-Scale Size of OSC
I actually think I am going to make a separate post entirely for this because the OSC scale confuses me and I have a couple more questions about it not related to this topic.

Thank you to anyone who reads all of this and for any info shared

[advice2020]

Still interested if anyone has any ideas