This is possible using Trakt. Add a movie or series to your watchlist, sonarr & Radarr sync from this list and add to jellyfin.

There’s also a plugin in jellyfin itself for Trakt that can report back to say when you’ve watched it I believe.

Chromecast 4k is my choice

Think the “Quality Definitions” section of the settings in Radarr is what you’re looking for.

I had visual voicemail on my previous 2 pixels (O2 in the UK), but not on my galaxy s23 ultra on the same network. Seems to be a pixel/iphone exclusive feature.

Decent VPNs should be mostly unnoticeable