I’m using amcrest cameras with frigate. They work offline, but their doorbell cameras are wireless only, IIRC.
Frigate records and does object detection, so you can get notifications(with photos in the notification) only when there is a certain object in a certain area(like only people in one area, cars and people in another, cats in a third area).
It’s a cheap setup if you already have a server running 24/7. It takes quite a bit of setup, but has been trouble free since.
It appears to be a browser plugin that bypasses those countdowns that paying link shorteners use to force you to look at ads. Sites like adf.ly