The leaders of this group are a ways out in front. At the end of the first 60 second video, another individual appears on the right side of the screen. This is probably the main body approaching the camera. The camera then takes one minute to reset and triggers again. When the second video starts, the apparent end of the group has just passed the camera. It looks like it took 2 minutes for this entire group to get by the camera. That would make this a large group.