The room full of piggy bank analogy is IMHO a lot more effective and accurate explanation that this video which barely brushes how Bitcoin works. (I too have been explaining Bitcoin to people since 2010 while being deeply familiar with its internals.)
I hate these clumsy startup-ish videos(I wanted to type `z' at the end of the word but I remember the last night (US day?) post...).
I agree that explaining people (be them 7 or 20 years old) what bitcoins are and what the fuss is all about is quite complicated.
Usually I just send people that video, but this explanation is pretty interesting (maybe not as effective as the video, though).