Currently using BlueIris to read/record streams from Ubiquiti IP cameras* set to run in standalone mode. I chose that software since it is a one-time purchase rather than something monthly; and chose the cameras as they were fairly inexpensive when I bought them (5ish years ago) and they supported power over ethernet, which makes running cables to them so much easier (just have to run a single ethernet cable to them, don’t need to run a separate power cable).
I’ll probably be redoing my setup in the future. Most notably swapping out BlueIris (Windows) for something Linux based as my trust in Microsoft has steadily declined.
*I do enjoy the irony of these being mentioned given the thread we are in. I at least have them banned from talking to the internet.