I had to laugh because it reminds me of my first wedding. A friend of the bride and I insisted on videotaping the wedding as a gift. He was also newly budded "pro" photographer.
He actually did manage to get a few minutes of us on the tape after running out of power, taking a while (during the ceremony) to find a new battery, and then spending most of the footage he did get by taping the singer (she had such a nice voice you see!).
Even better is that he later decided he was short on income and wanted to charge us for the travesty! No longer a friend after that!