As stated earlier, the lead camera was shaky being bounced around the course (It's not like the smooth paved road of a marathon route).
In my previous life I was a pro photographer, and I did a fair amount of video as well. If they wanted to make this go away, for as little as $100 they could buy a handheld gimbal. If they wanted to get fancy, they could pay a little more for a really good one. Not sure why they don't think of this when doing XC from the back of a vehicle. I thought of it when walking while filming a wedding, ffs.