Does anyone know if it is possible to restore a previous file version as its own separate file without downloading and reuploading it? I ask because I know I have at least a few image like this one where it used to be a completely different image and the file link still exists in the previous locations even though the new image isn't meant to be used there.
Highly unlikely... what you're basically asking is re-associating a new file page with an existing old rev of an image. That would cause a DB nightmare.
The real problem is that file upload basically needs to think it is uploading from a drive volume location and not a web URL or online location.
I use a cloud browser that has cloud storage that fools file upload into thinking the cloud storage is a drive volume, but I get to use it for free because it is my company's product, otherwise it is $10 per month or so. There used to be a free trial, but it got abused so much the company pulled access to it.
Huh what? You're probably thinking about an non-default feature that allows tailored egress obfuscation or other ways to avoid identification. The base cloud browser itself wouldn't help vandals that much.