Hi there, @Arjulaad! It sounds like you are using the Advanced Motion detection. Your Video Recording Length adjustment most likely saved as intended, but videos may still be shortened to avoid any false or unnecessary motions. Motion Verification makes Motion Detection more accurate because it reduces unwanted motion notifications and trims recordings before they end. For example, if there is a Motion Event, like a person walking in front of a camera, your camera might keep recording even after the person is out of range of the camera and nothing is happening.
The updated motion detection feature that gives you the ability to create customizable motion zones has the Motion Verification feature include into it. So you now have Motion Verification with Customizable Motion zones. These features were combined to give you a more precise motion detection experience on your battery devices. This is also why you will not see Motion Verification as a separate feature in your app. Feel free to check out our help center article for more information about these motion detection options. I hope this helps!