Videography: Keeping the Joy Alive    Charlie Hall was a career journalist before opening a company devoted to celebrating family memories on video. In addition to weddings, he produces videos that tell the life stories of family elders, and he has produced organizational histories for professional associations.     "Every wedding day has its own story. For some couples, the sacredness of the ceremony stands out. For others, the bonds with family and friends burst into life at the reception. As I record and edit each wedding, I try to think of it as more than a passive visual documentary of the day. I try to think what is going to be most important to this particular couple, a month from now, a year from now, 10 years from now. "I also think video is a profoundly underrated tool, and that its real value will only be appreciated through time. I imagine couples at their 25th and even 50th anniversaries hearing their own vows again, seeing the laughter of beloved grandparents now long gone and the delight of young nieces twirling in their white dresses, now grown and married themselves. "I truly see this simple video as a chance to preserve the magic of our best selves on our best day, to look at and savor whenever we choose. And I treat that with the respect it deserves."