[zakki]

I have an idea but needs some works:

Create a network just for the camera(s) - I.e. different wifi router.

Find out the server IP that the camera sends it’s video to.

Connect a pc/rpi to this camera’s wifi router on WAN port.

Assign all camera’s server IP you found above to this pc/rpi.

You should get all the traffic from cameras to their server. Up to you now what you are going to do.

[zo1]

Unless the canera uses HTTPS and certificate pinning so you can't re-assign a different IP to their domain. Snark: Good job privacy advocates!