I bought one of these a couple of years ago.
https://www.amazon.com/gp/product/B07FSFXZZ3/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
I connected it to a wireless wifi repeater and hid it in the basement rafters. It stores a month of video on a one gigabyte hard drive before it gets written over. I can connect to it from my phone and see what is going on. No monthly fees, just stored in the rafters on the hard drive. Two of the cameras have been outside for two years and still work fine.
Actually it’s been three years and still works fine.
thank you
From your link:
“Smart notifications with email/ snapshot alerts will be pushed to your smartphone via iPhone/ Android App when motion is detected. you will get extra peace of mind by receiving instant alerts and get notified of what’s happening.”
And freely spy on you.