Gone are the days of grainy cell phone footage or relying on a buddy's shaky memory. Systems like those from ACE Golf Systems
Seriously. Mount your smartphone on a tripod or have a playing partner stand behind you. The definition of "HD" requires a clean recording. Use 60fps (frames per second) at minimum to capture the ball's descent. HDHole In One
Ensuring every blade of grass and the dimples on the ball are visible. Gone are the days of grainy cell phone