You could throw Garage or Minio in a container and upload the images to a public bucket.

I’ve been the one setting up the TV app, etc.

That is exactly the issue. I can’t personally set up the app for all my users. Most of them are not in my household.

I ordered a TrueNAS system from iXsystems a few years ago, and the reasoning they gave me is that Linux has better driver support, especially for home users.

Whether that was actually the reason, I have no clue. But that’s what they said.

I’ve never even heard of signal