Hi Nat and Borate, thanks a lot for both of your suggestions and for taking the time to review my "Memories of Itay" video. A few days ago, I finally got my video to export properly (with all the photos and effects) when I transferred the project from my PC (which is 8 or 9 years old and perhaps might have stability/RAM issues as a result) to my new Mac (which I generally use only for recording on Garageband). Even on my Mac, I encountered similar problems, but after two or three attempts, I shut it down, restarted Videopad and cleared the cache, and mysteriously, the last attempt exported properly and it's now on Youtube at https://www.youtube.com/watch?v=Vj4miVAkzwU .
Yesterday, I compiled another video for another song of mine (though this time, I used only two EP/album cover images I did on Photoshop, and varied them by using various Videopad effects), and fortunately, this time around, everything exported well (on my PC, without needing to do that on my Mac). Anyhow, thanks again to both of you for your help and Happy New Year. If you both are in the regions of Australia** that have been hit badly by the wildfires, I hope things improve soon. Marc Fedak, Toronto Canada.
** I'm guessing that you both work at NCH, and my understanding is it's based on Australia.