Using Vegas Movie studio 16.0 Platinum purchased last week (end sept 2019). Trying to make movies with both photos & videos + sound tracks. When I transfer videos downloaded from Youtube, I can see them properly on the Vegas preview screen when I click on "Read" button. But unfortunately, once the movie has been edited, some of the videos show up properly, no problem, meanwhile some others do not appear at all (black screen) : why ??
Can someone help me on that issue and give me some tips ?