"Really? In the cameras themselves? That’s kind of hard to believe. "
yes, really, plenty of these being deployed for instance...
https://meraki.cisco.com/products/security-cameras/mv12n
...as well as the earlier generation
they're not perfect, and moving storage/analytics to the edge is not the best for all applications, but where it makes sense there's real benefit to eliminating back-end systems which need deploying, space, power, managing and maintaining