Yeah I’ve assumed that the landlord owns the router and it was already connected wirelessly. How else would landlord know the WiFi password and get the camera connected if tennant installed router when they moved in.

RTSP is a universal protocol, no reason it will only work with an app.

However, might require creds to access the stream.

DON’T block it yet. Do some research into what the rtsp stream URL of the camera is, then check if its pointing within your property and if it is then where (bedroom, bathroom etc.).

This info might help: https://www.ispyconnect.com/camera/ipc365 or this https://www.use-ip.co.uk/forum/threads/url-for-generic-ipc365-ip-camera-to-be-used-with-ispy.4312/

Use protocol + IP address + path to view the stream.

Don’t forget, this might be innocuous, you don’t want to be paranoid about it if it’s actually nothing to worry about, e.g. a camera in communal area or outside or something.

Don’t forget to update us with the results.