What's the Videopad version? Here's the latest. What is the export file type? Are default settings being used?
If possible, upload a project that displays this behavior. Someone will check it out.
With your project on the time time line, click FILE|SAVE PORTABLE PROJECT. Upload every file that results to DropBox, Google Drive, MS OneDrive or the like.
Make the link public and post it here. If there are many files, zip them first, then upload the ZIP file.