Echo Show and simple security camera

[OnaRoll]

My dear Mum has an old wireless Baby monitor that stays on all day and looks out the window at her front door. It's just packed in.

I bought her an Amazon Show for Xmas and I am looking for a cheap camera that can record movement (through glass non pir) and stay on screen continually if she wishes.

Just needs to be really simple but it has to have sound and be able to view constantly if required not just on alerts.

It gives her a comfort to look out side without getting up.