I have 4 cameras currently in use. Up until yesterday when I got a notification it would show a short video of the motion detection. No on 3 cameras that still happens but on 1 all I get is a still pic. I cannot find how to change this in the app or on line.
If one of your cameras is using the Cloud service, that one camera will show a picture of the motion alert and not a video clip. But if you go to the live video feed of that camera the timeline across the bottom is the cloud recording. At least that Is what mine does.