As suggested by @dgomes in home-assistant#19758, here's a camera backed by image files on
a WebDAV share. The entity exposes a stream and individual images, iterating
through the images in sorted order by filename at a configurable rate.

I think I was thinking in another language, since this was not valid Python. Result was that the thread that maintained the SocketIO connection to the table would die early on, so no status updates were actually flowing from the table.