ART,
I'm trying something new to make it work. so far I have recorded some narrations and did not loose the main sound of the videos. Time will tell if this process works.
1. What I did was two things; first I keep two copies of the program saving one to go back to if I had to and one that I keep adding pictures/videos and narrations. That way if anything goes bad I have the file to open and replace the corrupted one with the saved good one.. I make and add material to the one program and then save both programs every twenty minutes rewriting the program that was backup.
2. I have been adding narrations with the mute off and this seems to be what's saving the sound on the other videos, It's the mute box that's near the record button, I un check it leaving the box blank.
I'll be playing with it for a while and let you know latter how successful I am.
Ron