Help! I have no idea where to go now. I think I cleared everything that is to clear in Sen's Fortress (4 Titanite Demons and that Iron Golem + I freed Logan), I got to Anor Londo, killed those 6 big guards, killed that gargoyle downstairs, and I found that big-ass yellow fog door.
I was thinking that I should maybe go to the Tomb of Giants now (or even Demon Ruins), but it'd be great if someone could give me a hint what I need to do/where to go to unlock yellow fog door in Anor Londo.
(Ninja edit: just got Dark Souls 2 from the Steam Sale, looking forward to it! And man, that dude in the linked video is crazy! I'll never be that good :/)
(Edit no.2: I also checked New Londo Ruins, and I cleared what I found there (one fog door that leads to that house with the guy in the red robes on its roof), and I had no idea where to go next from there. Did I miss something obvious?)