I remember an announcement that the feature enabling remote viewing (outside of network) has/will become a paid function on Plex. But I haven’t followed it so don’t know all details

Thanks for the clarification

What I will say needs to be fact check because I never dig much on it since I’m not using w11 so I can be wrong. There is a feature called recall which take regular snapshot on w11.

A quick search about gives different results but it is apparently a opt in feature, so unless you enabled it, it shouldn’t.

https://www.uniladtech.com/news/microsoft-controversial-feature-screenshots-your-activity-914592-20250417

If you think it does this from your browser search, try using a second device which isn’t windows based to browse the net and see if its still guesses right

Emby was but not anymore (for a few years). Only jellyfin is open source