Though, on the other hand, having the video saved offsite is useful because then anyone with physical access to your home can’t get rid of the video showing they’re there.

I have Blue Iris configured to send all alert videos to one of my storage VPSes via SFTP. As soon as someone is detected outside, the video clip is sent offsite.

The server and the PoE switch that powers the cameras are also on a UPS, which helps if the intruder tries to shut off the power at the main breaker (which, here in California, always needs to be located outside).