That is very cool.. Post the full video also, I wan't to learn you rmethod.
Sorry; I overwrote the original on my camera when I did my negative time multi last night. Anyway, there's nothing particularly special about the method. I just solve it similar to the way Chris Hardwick explains doing a 4x4x4 or 5x5x5 on the tutorials here (and I have a tutorial for 4x4x4 centers); I also use some r2 for wings. I'm hoping to put up a tutorial on obliques sometime soon - they really work just like the other centers, but I use a couple of tricks that really help me go fast on them, and I think it might be useful to others to describe them. As it turns out, obliques are the easiest centers of all to solve. I'm still probably a little slower on obliques than on the other centers, but that's just due to familiarity. Eventually (with practice), obliques will be significantly quicker than + and X centers on the really big cubes.
I'm doubting I'm going to try a negative time multi again next year - I'm hoping that by then I'm consistently sub-hour on 7x7x7 BLD, so I can do a 7x7x7 BLD in negative time next year.