Welcome to the new helpfile for VirtualDub 1.5+.
The old help file used to have some general tips on how to create video, but I've come to the conclusion that such a help file is too much effort to maintain and that my efforts in this area are better spent explaining what the options do rather than how to use them. So, currently, this help file currently consists of comprehensive explanations of what various settings dialogs in VirtualDub do.