Have you considered using something like a Verizon or Sprint AirCard to stream video to an actual secure location. Maybe use a tethered cell phone to do so.
Looks like a fun project and I’d love to help work on it with you if you like.
I’ve looked at it, but it doesn’t appear to be fast enough to stream a decent picture. I’m still exploring some options and another type of system that should protect me for now has been put in. Send me a private message.