I'm also working on this video that I hope I can project in my studio as well. I figured out how to overlap two videos on top of each other, but I cannot figure out how to keep an animation with a transparent background once imported into iMovie. I have to save it as a .GIF in Illustrator, but then iMovie can't import .GIFs. I tried JPEG, but it turns the background white. Going to try a .PNG after I eat dinner, but if that doesn't work, I don't know what I'm going to do. If anyone has any suggestions- please contact me!!