Okay,I could be wrong but I think HD Camera’s employed in films,is like a digital camera.Where in old camera’s you need reels,and also for Movie camera’s that require reels.But with HD-Camera’s,you don’t need a reel,and it functions like a Digital Camera.Where when you take a shot,you can decide whether or not you wanna keep it.If you don’t you can delete it and continuous shots until you are satisfied and save them.This helps a lot in films and photography.And the quality of the picture is ten times better.
Or is it something else?