Sorry for the newbie rocket question: Blast off happens around 33:00 in that video. The rocket appears to be vertically still (does not move) for the first 4 to 4.5 seconds. Is it held in place, or are not enough engines burning (yet) to induce take-off?
While I cannot say if it moves immediately, it definitely moves within 2 seconds. It does not appear to move because it is so massive at more than 100 meters.
