https://www.amazon.com/Rode-VideoMic...FYKD8S5M41N2VC
Or something like that. With a short shotgun you'll get a cone of mic focus in the direction it's pointed, so the sound corresponds to what's on screen.
Off axis rejection isn't anywhere near 100% so you'll still have ambience, but whatever's in front of the camera will predominate. Then it's a matter of how far away from said action the camera is-- the further back the wider the cone at the focal point (kind of like a lens).