Did you notice how much the videographer zoomed in? Just because they were both in the same frame does not mean they were as close as you think. There is just no way to tell, zoomed in that tight, how close they were except along the axis the camera was pointed.
It was hard to see exactly what kind of line they approached each other on because the other plane didn't appear until they both pulled. Well, once you are past each other it doesn't matter how close your exact line-of-flight was because you can no longer collide.
I might not be explaining that very well; think of it this way. You and I drive toward each other each of us on our own side of a single centerline. As soon as we pass abeam each other we steer sharply across each others' path - but we pass behind one another. This is a common airshow act, even the USAF
Thunderbirds and the US Navy Blue Angels solo ships do this - and they set very high safety standards! It looks more dangerous than it actually is, but it is quite dramatic.
Still, it looks like a good airshow.
Happiness is not seeing another trite Ste. Maarten photo all week long.