Just some more on this:
I would like to store a large encrypted video library on Google Drive with files between ~300MB and ~5GB, and have ready access to the files from Ubuntu 18.04 - without having to actually sync or store the entire library on my local machine. That is, I would like the files to load (or stream?) on demand, only when they are accessed, when they are moved, or the file names changed etc - all of which would be handled by Cryptomator.
To test this I used Cryptomator to create a vault within the directory where Insync has my google drive mounted, and I then moved 5 videos of ~300MB into the virtual drive Cryptomator mounts to a directory - all of this occurred on the same local disk. The files encrypt and move quickly, but it seems I need to have the entire encrypted vault synced/downloaded to my local disk to make changes or even access it.
Is there a way with Insync 1.5.7 or Insync 3, where the encrypted vault could be browsable, but the files are only actually downloaded when they are accessed?