How to access the DVR in a secure network?

Question

Computer networks

Good afternoon.
I will try to describe the essence of the problem in as much detail as possible.
There is an analog video recorder to which cameras are connected. Registrar - rvi-r04la.
The DVR is connected to a zyxel keenetic 4g 2
router. The router is connected to the state network. institution that prohibits external connections.
The problem is that there is no way to connect from the outside, directly to the DVR, in order to be able to watch what is happening in the stream.
Is there any way to bypass this limitation?
Are there any crutches?
One of the solutions that I saw, but I don’t know how to implement yet:
Upload video from the registrar to spv, divided into 1 second segments.
Some kind of software to connect one-second segments into a stream.

Answer 1

Do you even have permission from the outside to access video surveillance?

Answer 2

if you can't get through from the outside, you have to get out from the inside.
those. configure the server with the registrar to communicate with your computer from outside, from which you want to monitor. to throw the tunnel roughly speaking, vpn.
or not the server itself creates a tunnel, but any device on the network with the server that has access. For example, a router, such kinetics seems to be able to do this on standard firmware.
Or a situation where nothing can be configured inside at all? Then it's probably illegal.