Noisey, a sub-site of the uber-hipster king of irony, Vice Magazine, recently completed a surprisingly unironic video interview trilogy entitled "One Man Metal". These videos focus on three "One Man" Black Metal projects: Leviathan, Xasthur, and Striborg. I was a little skeptical at first, but the interviewer seems like a veteran metalhead. In fact, to prove his sincerity to Wrest of Leviathan, he gets a tattoo of the "Howl Mockery at the Cross" album cover.
Anyway, there are some really interesting interviews with all three artists: really fragile moments with Malefic, emotionally dark moments with Wrest, and some awkward moments with Sin Nanna.
You can start the unholy trilogy here.