"Off-topic: Most stories about politics, or crime...unless they're evidence of some interesting new phenomenon. ... If they'd cover it on TV news, it's probably off-topic."
The video is part of an ongoing story: the wide-ranging political and diplomatic implications of decentralized leaks that can't be kept from the public once they're out. This story is certainly evidence of an entirely new, technology-centric phenomenon that I personally find highly interesting.
This is not his personal affairs; this is a public speech he's giving about Wikileaks, and an alleged international conspiracy to destroy the organization. Maybe it's trumped up, I'm agnostic on that point. But it's highly contentious whether or not this is about Assange's personal affairs, or if his personal affairs are being used as a weapon against Wikileaks.