Last one in the series! (At least until the World of Warcraft followup!)
Did you miss Parts 1-3? Go watch them: Part 1 | Part 2 | Part 3
In this last part of the series, Yu-kai talks about how Geomons work within the Game Loop of Octalysis Prime.
Yu-kai also discusses how to create value and in-game currencies that matter to the user, just as he has done with Chou Coins in Octalysis Prime.