In the Reddit thread dedicated to this video, he describes the lighting conditions as terrible:
There were terrible lighting conditions so I shot in manual. It was dark clouds for 10 minutes then bright direct sunlight for another 10 the whole entire game .
And then goes on to describe his camera settings:
For the most part I hovered around 1/1000 or 1/1600 and kept it on the widest aperture possible. I had auto ISO on and set the limiter to 3200. For the most part the ISO never got above 1200 which was nice.
The movie then shows the photograph made from each camera click. This turns out to be a very interesting video, giving you a wider perspective of what the photographer is looking for in a football game, and what can be achieved with modest equipment. Oh, and that sound… the lovely, unmistakable sound of the mirror and shutter clacking as he shoots. Try doing that, mirrorless cameras!
[me taking pictures of people running around on a field | “ZoidbergRage”, via Reddit]