Honestly, for many students rotational motion is the least familiar, and therefore challenging, topic in mechanics. To help make our studies of rotations as painless and as familiar as possible, we will compare basic quantities needed for rotations to old favorites from linear motion. Basically, just about everything we did in linear motion will have the same mathematical relationship in rotations. For example, constant acceleration, Newton's 2nd law, and kinetic energy will all have the same general concept and form in rotations, just with new rotational quantities.
It is these basic rotations quantities that are introduced in this video. They include angular displacement, angular velocity, angular acceleration, torque, angular momentum, and rotational KE.