Twirl
The Twirl spins the image around the center, creating a "twisted" image.
In the Properties Area of the Video Effect window you can change the effect propertieschange the effect properties.
The properties of the Twist effect available for setting are its degree and angle.
In the figures below you can see the video picture before and after applying the Twirl effect:
Before applying the Twirl effect
After applying the Twirl effect