The 1960 FOR film by Dr. Ivey and Dr. Hume is available online for free. Since it is from 1960, it is in black and white and does things old school - in the best possible way. My students love this video - even if I am not there, because this worksheet chops the film into specific pieces and allows them to stop it to answer the questions.
This film clearly explains why centrifugal force is a fictitious force and illustrates the concepts in surprising ways.
Keywords: inertial, non-inertial, frame of reference, velocity, acceleration, coriolis effect, foucalt pendulum, centripetal, centrifugal, force, gravity