The guy introducing himself - seems quite plausible
https://www.youtube.com/watch?v=LdvQTwjVmrE&feature=youtu.be...
I'll bet that the story here will turn out to be that he's built a backstory around being Satoshi in either an attempt to get famous, or some fraudulent scheme to profit from it.
On reading the tax stuff, I'm wondering if he's told the Australian Tax authorities that he is Satoshi.
How can anyone watch this video and not see that it's a braggart looking for some fame?