I completely understand the frustration of everyone here, but am I the only one that thinks that purposely leaving in a shot of the back of the photographers head is wrong? I can get behind making a reel for others in the industry, or even a silly little compilation to show the couple at the consultation, but they (presumably) paid good money for someone to shoot and edit their wedding. I would think that they deserve, at the very least, the best angle to be shown at any time. If one camera is blocked by the back of a photographer, the best angle is your other camera. Even if it's a wide shot from the back.

I would cut to the other camera, and if they ask why that particular part of the ceremony from that particular angle isn't on their DVD, I would simply explain that the photographer was standing in front of the camera. I have met a few ornery brides and grooms in my day, but even the most unreasonable seem to understand the person-blocking-camera phenomenon.

Sometimes in the heat of things photographers do tend to forget that a video camera is rolling. I have worked with one photog for so many years now but sometimes he forgets the camera is rolling as well.

Hollywood sees this as well, during a wedding scene at a movie I saw, the shot involves photog blocking the shot.