I am setting up my first jellyfin server via docker, and I am offered the option to either use TMDB or OMDB. I have jellyfin on a LAN-connected device w/o VPN connection, and I am concerned queries to those DBs with file names of torrented files can get tracked and reported to my ISP. Could that be the case? And if so what to do about it? Are there more privacy-preserving metadata services than others?
First, change your DNS servers to something like Quad 9 so your ISP can’t track you that way. Then maybe consider switching to usenet, which is more secure in that you’re downloading from a server (or servers) over an encrypted connection instead of via torrent, where you’re both uploading (distributing) and downloading, and your IP address is available to anyone else downloading.
With usenet, all copyright-holders can really do is issue a takedown request to the indexer or host, neither of which is you.