Hey mate! Thanks for the reply again. Rclone does work properly ; my poll interval is set to 5m so the changes show up in the rclone folder. It was just that Plex was unable to see the changes unless I did a manual scan.
And I just set up mergerfs and it works! The changes get reflected in the mergerfs folder, even when it is added directly to the remote by the owner. The problem now is still Plex is not seeing it with partial scan, even though it is in mergerfs. I gather from your last reply that I might need to install the plex autoscan plugin to solve this. My only doubt is why even though the file appears in mergerfs, which is "local", it is not appearing in Plex when it should. By right, for local files you don't need plex autoscan, correct?