Nice video. I agree: however it would be great to add scarcity to the topic. You gave a little hint on the subject when talked about the cigarettes as a currency in prisons, but maybe you could go further on that topic.
Let's analyze water: it has tremendous intrinsic value, after all, without it, there is no life, however it's never used as currency, nor money. If the supply of water fall dramatically, will it become a currency? After all water has many of the features needed to be a means of exchange, but it is not.
Nice video, nice topic!
Indeed, I'll have to address this. Inflation fits right in there, too, and if there's any concept in economics worth fully understanding, it's inflation/deflation.
As to water as a currency, it would be an interesting world would it not? For something similar, check out the movie In Time. I quite enjoyed it.