No one has mentioned Frigate. It has taken the "homelab"/selfhosted world by storm & utterly dominates. Open source, works great, & by far some of the most sophisticated detection/triggering schemes one can acquire, period. https://frigate.video/

I have two Hanwha units I never got around to using at my last place. H.265 IP streaming out. Onvif is the main standard everyone seems to use for streaming out.