(Video, 940 kB. To view, click on "run" button underneath.) A male, adult inline skater in this group is followed by two children and a woman -- probably this is a family group. The two adults are seen performing shoulder checks for overtaking traffic before turning, though the woman does not hold her line of travel following the shoulder check. The children play follow-the-leader. All turn left in the crosswalk, from the right side of the road, allowing them a restricted view of traffic ahead where the road curves to the right.
Like other videos of casual cyclists' maneuvering on this site, this one provides strong evidence of the need for better bicyclist skills.