Check synchronization between a demo action and its explanation

An explanation should identify the action visible at that moment. Timing matters most when several similar parts or movements appear in sequence.

A useful audio check follows the signal from its source to the recording that a viewer actually receives. Keep a short reference sentence and change one control at a time. Write down the source, device, playback route and recording route so a later adjustment can be reversed. Listen to the saved result as well as the monitoring output; those are different checkpoints.

A practical procedure

1. Choose a visible action with a clear start, such as pressing a latch or turning a knob.

2. Compare its frame with the spoken instruction in a saved recording, noting whether speech leads or follows.

3. Adjust the action timing or audio alignment and check the beginning, middle and end of the segment.

Worked example: a fictional session

In a fictional container demonstration, 'press this tab' is heard after the lid opens. The host repeats the action more slowly and checks the export.

Check the limits

A single correctly aligned moment does not establish that the entire recording stays aligned.