Mint,
When you take a video, try to make sure your background has contrast from what you're wearing, and the camera is not too far away from you. In other words, we get a full string elbow to bow hand shot but not so far away that its difficult to see your string hand elbow. When the coach pointed out my slight creeping, it was because on video, and in the background, was a banner. You could easily see my string hand elbow against the banners graphics, making the creeping more easily identifiable.