I had a graphic designer create an intro to a video I'm making. He used a colour gradient so it is light grey in the middle of the slide and gets darker as it moves to the edges. His MP4 looks perfect. When I transfer his MP4 to the clip bin and produce and share it the gradient is no longer smooth you can see different shades of circles. I think it might have something to do with the compression. The file is a lot smaller. Any idea how to fix this?