Voiceover/Background Music and Changing Any Video in .Key File
In the latest version of Keynote (11.2) I've noticed two behaviors
that didn't happen in previous versions. After placing the images,
transitions and at last recording narration (voiceover).
If we increase or decrease the background music it randomly
disappears from the final exportation in video.
2.After recording the audio (voiceover) if we want to change
some video (.mp4) from the final .key file, it will not be
possible to edit it, leaving the frame blank.