Cool vid. Nope, never been there, but I want to go now. I'm in the hills of the peninsula. I've done a ton of hiking near my house but I've never found one.
Yeah, as far as I've found they stay in the East Bay. I've seen one in the Oakland Hills, but my friends that are big bikers have relayed disgusting (to me) stories about all of the tarantulas they encounter near Mt. Diablo and out that way.
I take it your never been to Mt Diablo during mating season then? The place is filthy with tarantulas. Just a random YouTube but at certain times of the year, the road is covered in them: https://m.youtube.com/watch?v=g4w5UbvaYy0