“Eureka! is a series of humorous, and information-packed programs that bring “boring” physics concepts to vibrant, vigorous life.”
I want to remark this Eureka! TV Series where you can find very good didactic videos to explain physics concepts such as the forms of Energy, mass, weight, inertia, heat, etc. (you can watch them at the EurekaTutoring’s channel)
Give a look for example at his one explaining Potential Energy with some references to Kinetic Energy too.
I present this classification with some of the most remarkable videos to be watched in 2º ESO, Natural Science ordered according to our program:
There is a total of 30 episodes and none of them lasts more than 5 minutes, ther were made in 1980, but physics have not changed so much at this level so far.
You can find the whole chapters list at http://www.rickstv.com/tvo/eureka.html