As I understand Meraki Security camera system is same as nvr system.The main difference is that when using meraki you don't have nvr and using locally saved videos together in your dashboard in your browser.
Correct, this is a fully NVR-less solution, all storage and processing/analytics is performed at the edge on the camera itself, and only metadata is passed to the cloud, so each camera is only putting a few Kbps onto the network if the video is not being actively streamed or exported. The only time video is stored in the cloud is if you export it, the exported video will be encrypted and stored in the cloud for 30 days so it can be repeatedly downloaded if needed without having to re-retrieve it from the camera. The maximum export length is 1 hour. And you can of course do multiple exports, but you cannot leverage the cloud as an NVR. If there are use cases and feature requirements for things like secondary streaming or NVR-like options, get these to your local Meraki teams so they can be tagged on any appropriate feature requests.