I've no idea how everyone seems to know so much from this poor quality CCTV footage. As far as I can see, the lights must have been red for the traffic when the pedestrian started to cross, else why were they all stationary? Another set of lights (presumably for traffic in the opposite direction so presumably in sync with the ones for the traffic we can see), show that they changed to amber AFTER the pedestrian had stopped and looked and then taken a couple of paces across the road. I can't see from the footage whether or not there are any pedestrian control lights, and certainly don't know whether or not they were working.
If, as suggested, the biker's view was obscured by "the Vito" (I couldn't tell what vehicle it was TBH), then he shouldn't have shot off like that. Blind faith in a road being empty isn't the way to stay alive.
Finally, unless the footage has been cropped since the earlier comments here, how can anyone accuse other drivers of not stopping to help. The footage that I'm looking at shows the white vehicle driving past the injured pedestrian by just a couple of feet before stopping again. That driver may not have realised at first that the pedestrian was there, having had his attention distracted completely by the motorcyclist, but then stopped. I don't know, but I've certainly seen no more than a pedestrian apparently leaving it a bit late to cross the road and a motorcyclist in too much of a hurry to look where he's going and then riding off after hitting the pedestrian. That's it - no more.