Dear Dr. Sarwana,
This video is a delight to watch --- particularly observing a cute young guy excitedly learn something. The video serves as a good example to parents and grandparents alike in how to expose kids to important science principles.
This gets my community vote of course.
If you have an opportunity I would appreciate a review of my entry (Special Relativity, just geometry).
Best of luck in the competition,
Alexander Roth