That would be tool assisted runs. Is the video you posted tool assisted? I thought it wouldn't be, because he spent 175 hours to perfect it. But if it is, then that's just lame. I have no respect for tool assisted speedruns.
I have no respect for them either. I do not know if this is. Bunker is relatively easy though. I know I can do about 10-12 levels on LTC mode, and 3-4 on DLTK mode myself. I had to change my youtube screen name when I called them on using that tool because I thought it was cheating. They insisted it was not! I know if I had to play 1,000 times just to get back to the same spot with out tools I would smash the game. But with the T.A.R it doesn't matter. They have this for Perfect Dark as well!