Hi Veronica. I'm sorry, I just saw this question. (I think it goes in About Tennisopolis) Anyway, let me try to help. Can you show me to a picture or video that is having this problem?
M
I'm guessing that you need to take a look at the size of the original photo you uploaded. The first few on your slide show are normal but I do see the ones you are referring to being small and centered. If they were thumbnails that might explain it. I try to keep mine sized around 400x700 and they work fine in my albums and slideshows.
Hope this helps, or at least gives you a starting point!