Replace one tutorial mistake without rerecording everything

Write down exactly what is wrong: a menu name, a click, an entered value or the result itself. A spoken typo with correct visuals may need only a voiceover. A wrong action that changes later results needs a larger replacement, because correcting the words alone leaves the demonstration inconsistent.

For example, if a spreadsheet lesson applies the wrong filter, identify every later view affected by that filter. Replace the sequence through the first point where the corrected state genuinely matches the original. Do not join two clips merely because their windows look similar.

Use demonstration data and restore the relevant document, selection, scroll position and open panels. Match the window size, display scale and camera placement as closely as practical. Record a few quiet seconds on both sides of the replacement so there is room to choose a clean boundary.

Keep notes about the app version and settings if the interface has changed since the first recording. When a precise visual match is impossible, a brief title such as “Updated settings screen” is clearer than disguising the difference.

1. Mark the last correct frame and the first reusable frame.
2. Recreate the state before the error without altering important original work.
3. Record the corrected action and its visible result.
4. Capture the replacement narration with a similar distance and room sound.

In iMovie on Mac, select a timeline clip, position the playhead and choose Modify > Split Clip. Split at the correction boundaries, then arrange the replacement between the retained parts. Save the original capture outside the working edit. Reel is the recording stage here; this is not a Reel automatic-repair feature.

Watch the cursor, camera and audio as the join plays. A dissolve can make two screen states overlap confusingly. A simple cut with a short explanation may communicate an update better. Listen for a clipped word or an abrupt change in room noise.

Follow the revised instructions from the beginning with a fresh sample. The edit should produce the claimed outcome, not just hide an awkward moment. Recheck captions and chapter times after changing the duration.

Open the exported file and replay both joins. Keep the pickup and project alongside the original until approval, so another small correction does not require rebuilding the entire lesson. Arte Soft publishes Reel; no editing experiment or automatic repair is claimed here.