Never ever had a trouble making a video tutorial – help file. Tried to make one for my latest template since yesterday, there is no sound after exporting it. I use Demo Creator but also a video screen capture which is very fast and very efficient,in both cases – no audio. I goggled and found that there is a kind of problem with latest QuickTime player so i downloaded Quicktime player 7.0.3 (as they prefered) and some 2-3 different versions same result – no audio after exporting at .MOV and .mp4
os Win7 64bit
I use Fraps to record my stuff, never had a problem with it, but it isn’t free. I would consider checking it out though.
I’d recommend Camtasia.