It’s always a good idea to be aware of the videographer’s whereabouts. He's usually easy to spot because his camera will probably have a bright spotlight glaring at or near you. If you see or sense a bright light heading your way put a smile on your face or begin talking to the person next to you to show the bride and groom that you are enjoying yourself. People almost never look good eating on camera so that’s why I didn’t suggest that you begin eating.
Remember, you don’t want to be the one person caught on the final wedding video with a look of disgust, horror or just a rather unpleasant look on your face.