What version of Videopad is being used? What are the specs of the PC: GPU, CPU, free space on cache drive, RAM?
Share the project in its current state and someone will check it out. It's not difficult...
Here's how... http://nch.invisionzone.com/topic/23659-tips-for-getting-help-on-this-forum/
If it contains sensitive material you can link it in a personal message (PM) to me, via the envelope above. Be sure to FILE|SAVE PORTABLE PROJECT AS, not simply SAVE PROJECT, and don't forget to share it.