Sigil https://sigil-ebook.com/

My personal Invidious server works just fine.

For this application, I like flat files. After the initial sync, I only edit one little md file at a time and syncing it should not take long at all.

Now testing Obsidian -> Remotely Save -> webdav -> Synology NAS

I agree that I don’t like the sync stored in a db rather than a directory of files. I just reminded myself that Remotely Save also saves to webdav on my Synology NAS and to Nextcloud. Since I have both available, I will be looking at them again.

I use Obsidian with a docker version of CouchDB. Used to store on Dropbox using Remotely Save.