A few thoughts occur to me on this;
The Meraki MV solution doesn't store in the cloud (at least, not in an ideal deployment). While the solution is managed in the cloud and metadata is stored in the cloud, ideally the footage itself stays on the cameras (the vast majority of footage is never viewed, so why move it anywhere - particularly as improved resolution only makes bandwidth & storage needs ever larger)
Cloud Archive is available if you need it. That tends to be only if you have an absolute need to store some footage for extended periods though. Bear in mind that any clip of interest can always be exported as an MP4, to be saved wherever you like, for as long as you like.
You mention 'storing the video from the 2N intercom' - but the intercom system would not actually have anything to do with the footage, long-term, ideally ..?
You could stream footage from an MV camera to an intercom system, provided that system has the ability to ingest it and incorporate it in it's audio interactions with the user... That would use RTSP https://documentation.meraki.com/MV/Advanced_Configuration/External_RTSP