I’d go for syncthing over nextcloud for your specific usecase. Nextcloud isn’t good for unreliable connections and they’re sticking with the annoying decision of not supporting server to server synchronization.

Lol why are people such dicks? My vets sent pics when my dog was recovering from an operation. It’s a pretty normal thing.

Anyway, if it was me I’d just set up a stream of the webcam on peertube via OBS.