To post a link to a video, image or file here, upload the file/s to a free server, such as Google Drive or MS OneDrive, get a shared (public) link, copy the link and paste it here or to me in a Private Message via the mail envelope in the top-right corner of this forum. When using Google Drive, click SHARE and if necessary change "restricted" to "anyone with link can view."
And here, fully outline what's wrong, step-by-step.
What version of Videopad is being used? Look at the left-bottom corner of the window. What are the PC's specs: CPU/GPU/RAM?