Jon Aaron Bray on Instagram: "The script takes a video and produces a new version with a colored motion overlay, plus a CSV data log. Here's how it works: **Frame-by-frame comparison:** It reads two consecutive frames, converts them to grayscale, and applies a Gaussian blur to reduce noise. Then it detects motion between them using two complementary methods: 1. **Optical flow** (Farneback algorithm) — estimates the direction and speed of every pixel's movement between frames, producing a magnitu