The 180° Shutter Rule
The 180-degree rule is a standard in the film industry, and is a ratio between shutter speed and frame rate. When we are recording motion in video, there needs to be a certain amount of motion blur in each frame in order for the frames to look like they seamlessly go from one to the next. If there is not enough motion blur, the video playbook will have a jittery look to it.
To put is as simple as possible, you take your frame rate and double it for your shutter speed.