Bryan KNOWS he’s in this up to his taint and he isn’t willing to lie like a Clinton (brazen, unapologetic and daringly combative).
The Clintons know they are protected by their notoriety to some measure along with their connections, but this man is NOT. He KNOWS how easily her “you can’t prove that” defense can be taken apart because of all the people in this world who likely have access to what he tried to contain for her. His lawyer (probably not a Clinton lawyer) told him to “plead the 5th” and hope she gets taken down before they get to him.
The real fact of the matter is that this government (it’s NSA, the FBI, et al - likely so many other countries it isn’t funny) know every email she ever sent or received.
It is just a matter of when Obama and his ghouls are ready to cut her loose. When you hear Loretta Lynch on TV making a comment about it all is the day she’ll be over and done and out.