my point in the previous thread wasn't really to pinpoint which is easier or harder but rather, which has greater leeway. Badly composed shots (photography) will be badly composed shots. And for photography some moments cannot be missed nor reposed. I doubt you will want to ask the couple to rewalk the aisle right?
Seriously, you don't need an expert videographer if the editor knows what he is doing. Part of video editing is sound, something that poor editors do not understand. Often times, I see wedding videos with no appreciation to the music being played. The music should not be there for the sake of having 1, but rather flow with the music. That can at times, include the lyrics in relation to the image, the accents relating to a cut scene etc. If I'm a good editor, I don't actually need an awesome videographer. I just need relevant footage. If the videographer has good cinematography skills, a pair of steady hands for smooth pans/tracking all the better! I can tell you it is hard for videographer to visualise the flow until you really start doing the editing. What you require is long enough footage, but not too long. 4 seconds minimum to 10 seconds. You can only start to sync the videography with the music only upon reviewing it when you're editing it.
The reason why the video market appears more challenging is because editing video requires more than technical skills.