Please tap the camera "setting" icon > tap "Motion Detection" > tap "Duration" and select the duration you want.
There are 10s, 15s, 20s, Auto to choose from. It should be noted that the “Auto” mode is a paid feature.
If you select "10s", "15s", or "20s", the recording duration will be fixed 10s, 15s, or 20s. If you select "Auto", after the PIR sensor is triggered by a movement, the camera will record a video up to 3min if the movement continues. However, please note that the camera will consume more battery power in "Auto" mode because it keeps working in this mode.