[snazz]

This might not be relevant with modern systems, but about five years ago security camera systems were common where the individual cameras were connected to the local network and to watch them you would open some special program on a Windows machine. The cameras themselves had administration pages served over HTTP and they ran an ancient version of Linux.

Although I never tried, I’m guessing that all you would have to do is guess a password (not hard if it’s in a spreadsheet) to a UDP stream accessible through VLC. If you couldn’t guess the password, the software on the cameras is so old that you could find a plethora of exploits to use to get root and reset the password.