Bill Buckley is a documentarian whose images of tragedy and redemption have made him one of the most successful filmmakers in his field. Even so, you’ve probably never heard of him. Most of Mr. Buckley’s films are intended for an audience of just a dozen people. In fact, as far as Mr. Buckley is concerned, the fewer people who see his work, the better.

Mr. Buckley, 71, is a pioneer of “day in the life” videos, the short films whose purpose is to document the daily hardships and challenges faced by badly hurt personal injury plaintiffs, in the hope of maximizing damages at trial. A Buckley day-in-the-life costs just $3,500 (plus expenses) but holds out the promise of damages increased by many times that amount.