No I doubt she was hurtling; just going at normal cycling speed which is definitely far faster than walking and can still badly injure a pedestrian if there is a collision.
If you watch the footage again, she wasn't even doing that. She was slowed right down. You can see how slowly she was going when she comes into frame. She wasn't going at normal cycling speed when she was near the women even if she had been on the earlier approach.
I do question that, because it does seem to me that a cyclist riding at a reasonable speed for a pavement like that would have had time to stop as she saw the pedestrian approaching, because she could see that the space to get past is really quite narrow.
As above. She was crawling. She was pretty much fully past the pedestrian who leans/turns to reach her.
Ideal world, pedestrian could have take a slight step towards the railings and both would have had plenty of space. She didn't, fair enough, but even then there was enough space for them to pass safely, if snugly. It was caused by her reaching out aggressively towards the cyclist/shoving her. Had she not, both of them would have probably just got on with their days grumbling about inconsiderate pedestrians/cyclists getting in the way.