Weird. Not sure what's going on. Is the video something that you shot on your ipad, or is it something that you imported into your ipad? If it's something you imported in, what's the file type? The only thing I can think of is that maybe Keynote doesn't fully suport the file type, while the photo app does. Granted, that sounds strange, but I can't think of anything else. I just tried shooting a short video on my ipad & importing it into Keynote iPad & it worked fine.