Check permission and placement
Follow venue filming rules and ask before recording other participants. Set up where you do not obstruct officials, walkways or competitors. A stable, wide view of the two fencers and their feet is usually more useful for a first review than repeated close-ups.
Capture enough context
Record a short test and replay it. Check focus, orientation and whether the scoring display can be read. Start before the action and keep recording through the decision and score update. Avoid cutting immediately after a light because the next seconds can explain the result.
Label and share carefully
Keep an original copy and label weapon, date, stage and your side of the screen. Share only with the intended people using access-controlled tools. If a moment is obstructed, record that limitation rather than trying to infer a hidden blade action.