Mindstamp allows you to play a short audio clip on top of the primary video (which pauses) either at a specific point in time on the video or in response to a given viewer’s action, for instance a click on a button or specific answer to a question.
When adding an audio clip directly to a video at a specific time, the clip can either be recorded real time in your browser (you may need to provide permissions and please note that Apple blocks browser-based recording in iPhone and iPad), or they can be uploaded directly at that moment or at any time in your Asset Library (available from the primary drop-down menu). Regardless, once you’ve captured an audio clip it will be available for reuse in your asset library.