Unable to modify files in root even after booting it up as admin

Question

I'm trying to copy+paste a plugin for OBS under /snap/obs-studio/1284/usr/lib. It's located in root. The paste option is grayed out doing:

sudo su
nautilus

leads to me opening it as admin:///snap/obs-studio/1284/usr/lib however the option is STILL grayed out. Trying Ctrl+V leads to this error message.

I've tried to go into the permissions of the folder and then under properties to change the permissions, however I get this error message.

When I was installing Ubuntu I used LVM for file management, I had and still have no idea what this means. When I was installing it I googled and some people said it's a nice feature; I have no idea if this is connected to this issue. I just thought I should bring it up. I've found some people discussing the same issue, but for most people it seems like doing sudo su nautilus or gksudo nautilus fixes it, however as said this didn't work for me.

EDIT: I need to modify a root file because it's where the OBS plugins are locaited,someone suggested that they're in

~/snap/obs-studio/current/.config/obs-studio/plugins

However the /current folder is just empty for me, shown here:

Have I installed OBS wrong? I've just installed through Ubuntu Software thingy. Is there something i need to do in OBS? Also trying to automatically find the plugin folder through OBS's "File->Show Settings folder" doesn't do anything. Because someone asked: I need to paste this plugin to be able to record per-application audio. Application audio capture is only a thing for windows. I need to have the game audio and discord audio as separate tracks to be able to edit out certain clips of discord/game audio, in case someone swears or the game is too loud for a short time.

Answer 1

Those application directories under /snap are mount points for read only loop devices created by snapd and you can't modify them nor you need to ... Those are separate filesystems for a special purpose and not your usual kind of directories ... i.e. :

$ findmnt -T /snap/obs-studio/current
TARGET                SOURCE      FSTYPE   OPTIONS
/snap/obs-studio/1284 /dev/loop52 squashfs ro,nodev,relatime,errors=continue,threads=single

... those are part of the sandboxing/isolation mechanism of SNAP … their read-only state and their default permissions are part of that process as well and if you break them, those applications will break … you have no business there at all and even if you manage to somehow vandalize (by modifying) them, then they will be damaged and will stop working ... So, stay away from them.

However, their respective user specific configuration directions can be usually found under ~/snap (~ is your home directory) … For example, the plugins directory for the SNAP version of OBS-Studio on Ubuntu should be at:

~/snap/obs-studio/current/.config/obs-studio/plugins

... and that is where your plugins should go.