When I show up to film a wedding day, I have my shooter's eye trained for all the major moments - the look of awe and love on the couple's faces during their first look, the beaming pride of parents as their child walks down the aisle, the roars of celebration and joy as the newlyweds are announced. But if I'm being honest, the part that always has me getting misty-eyed behind the camera is the vow exchange.