# Demo replay validation (operator workflow — F11)

Upload a flight video and ArduPilot tlog from the same sortie. The suite UI shows two timeline bars: video above, tlog IMU activity below. Drag the video bar to align with takeoff on the tlog, refine the match, then run the demo. The system:

1. Extracts IMU and GPS from the tlog.
2. Aligns video to tlog using your coarse placement plus backend refinement.
3. Exports a canonical aligned CSV (single time base for replay).
4. Seeds satellite corridor tiles from the tlog GPS route.
5. Runs the same GPS-denied pipeline as live flight against the video.
6. Returns estimated GPS fixes, a map, and a PASS/FAIL accuracy verdict.

Advanced: upload a pre-aligned `(video, CSV)` pair to skip alignment (AZ-959).

Live flight (F3) is unchanged: IMU and frames from the aircraft in real time.