Reflection of overlay and insert

What I learned from editing overlays and insert clips was that at first it seemed confusing. What really helped me was the step by step instructions Dr.A had. Then I got used to it and now I can do it on my own. An overlay is when you take a clip and overlay it or put it on top of another part of a different clip. It then records over what was there originally. You would use this when you want to show twp things that are happening at the same time but you don't want to take too much time. An insert is when you take a clip and insert or put it in another part of a different clip. It then is adding to the clip but does not record over anything. You would use this when you want to show things happening at the same time without editing anything out.