SpaTrackerV2 is a 3D point tracking system that processes video input to estimate camera motion, depth, and track user-selected points in 3D space. It integrates multiple depth estimation models (ZoeDepth, DepthAnything, DepthPro) with a transformer-based tracking architecture, offering both offline (full video) and online (sliding window) processing modes. The system provides a Gradio-based web interface for interactive point selection with SAM assistance and outputs 2D tracking videos, 3D visualizations (HTML), and numerical trajectory data. Evaluation modules support benchmarking against datasets like Sintel and CVO. The codebase demonstrates modular design with reusable components for I/O, geometry, alignment, and visualization, though it relies heavily on specific external models and libraries.