VIDEOS
Difference between Gravitational Potential Energy and Gravitational Potential
Gravitational Potential vs Gravitational Potential Energy (Fizzics.org)
Chris Doner: Electric Potential
Chris Doner: Electric Potential Difference
Chris Doner: Equipotentials
Michel Van Biezen: "Voltage Potential Understood"
SIMULATIONS
Charges and Fields (PHET)
Electrical Force and Potential Energy moving "r" (BU)
Orbital motion and Energies (Simbucket)