I do want to know what Akio showed the other duelists to get over their reluctance.
I'm going with seduction, unless anyone has a better suggestion.
The show implies that they have tried this several times, so I bet he's good at it by now.
Oh, and the YouTube upload is legitimate and from the real licensor.
https://www.youtube.com/playlist?list=PLrrh84y760v-hDEulas0Tp_wiQy0FcjLl
Anyway, it's worth a watch if you're not terrified by cell animation, slow burns or homosexuals.