App recommendations for recording audio and video continuously?

I need to get an app that can be left to record continuously for days at a time. Essentially turning an old android phone into a security camera. I don't really care if the video is stored locally or remotely.

My downstairs neighbour has started complaining about excessive noise coming from our apartment, including while everyone in the apartment is asleep. So I need to have something recording continuously where I can clip out the complaint and the hour leading up to it, to prove that whatever they're hearing isn't us. Ideally it would show the noise in dB and the time. They have no legal basis for throwing us out, but I'd like to provide irrefutable evidence that they are delusional.

Thanks in advance for your help.