Well, if this is a scam, they must be the worst thieves on earth,  thieves who reveal every bit of personal information about them, and can easily be legally brought to justice just by using their own words/videos etc.. This is one of the major reasons why i think this is legit. Another factor, is the chances they had to dump and didn't take ... they could of easily made few hunderds of bitcoins just by dumping their stash, and run away but they didn't.