How to send RTSP to the cloud using a router with Padavan firmware?

Question

linux

There is Xiaomi mi 3G with Padavan firmware.
There is an onvif camera that gives an RTSP stream.
In extreme cases, there is a Raspberry Pi (if the router cannot handle itself).

I would like to organize a surveillance system, so that if everyone takes out the video from the camera, it remains. (turbulent area)
No cloud subscription fee. (google drive, etc.), (ivideon used, but they closed the free plan)
Ideally: motion detection, but it needs a lot of resources. Notifications on the phone with a freeze frame.

If you know suitable guides or ready-made assemblies, I will be grateful for the info.

Answer 1

cut out pieces with movement with ffmpeg's scene filter and send them to the cloud/telegram channel
https://superuser.com/questions/984841/ffmpeg-remo...
for raspberry look at this thing:
https://demo.home-assistant .io/#/lovelace/0
https://www.home-assistant.io/hassio/installation/