Whats the most critical frame-by-frame detail to focus on when analyzing a video of a crash that can often be overlooked by cyclists, and how does a precise understanding of this detail prevent similar incidents from occurring in the future? Does the position of the riders center of gravity, the speed and angle of approach, or the exact moment when the rider reacts to an obstacle have the most significant impact on understanding and preventing future crashes? Considering the inherent subjectivity involved in interpreting crash videos, what strategies can be employed to systematically analyze and draw actionable insights from this type of footage, and how do experts in the field reconcile differing opinions on the matter?